Journal of botany, British and foreign

Transcription

—
377
ALGM FROM CENTRAL
By W. West,
AFRICA.
F.L.S., and G. S. West, A.R.C.S.
(Plate 301.)
The small collection of Algno which forms the subject of this
paper was made by Dr. J. W. Gregory during the expedition to
Mount Kenya in 1893. The gatherings were not very rich, but
proved to be most interesting they were as follows
:
;
1.
2.
3.
4.
5.
Inkuyuni, Kamassia (from rocks in river). Camp no. G3,
Coll. no. xxiv. 30th May, 1893.
Lake Losuguta (water with sulphides). Camp no. 51, Coll.
no. XXV. 16th May, 1893.
Lake Baringo (mud with diatoms). Coll. no. xxx. May, 1893.
G. Laschan, Leikipia. Camp no. 71, Coll. no. xxxviii. June
13th, 1893.
Mwangadan River, S. of Fuladoga.
The last one consisted of a mass of dried algte in paper, and on
Of the other four, which were
soaking out yielded many species.
in tubes, no. 4 was the only one which was not thoroughly dry,
the corks of the others being almost entirely demolished by beetles.
From no. 5 several zygospores of a desmid were seen (diam. c. spin.
43 fj.), but, as no semicells were attached to them, these could not
be determined.
(Edogoniace^.
1.
major.
2.
(Edogonium
sp.
Mwangadan
(E. sp.
Crass, cell, veget. 6"5-7'5
River, S. of Fuladoga.
Crass,
veget. 13-5-15
cell,
/x;
/x;
longit. 5-6-plo
longit. 2^-4-plo major.
G. Laschan, Leikipia.
CoNFERVACEiE.
3.
Cladophora crispata (Roth)
Kiitz. Phyc. Gener.
U. S. 126, pi. cix. f. 4-10
Crass, fil. 29-42 fi.
143, pi. 55, f. 3.
Freshiv. Alg.
;
264 Wolle,
Cooke, Brit. Freshiv. Ah/.
Mwangadan
;
River, S. of
Fuladoga.
Ulotrichace^.
HoRMisciA suBTiLis (Kiitz.) De Toni, Syll. Algar. 159.
Ulothrix subtilis Kiitz. Phyc. German. 197; Rabh. Flor. Europ. Aly.
4.
365.
Var. vARiABUiis (Kiitz.) Kirchn. Alg. Schles. 77.
Ulothrix variabilis Kiitz. Species Algar. 346
Rabh. Fl. Europ. Alg. iii. 365.
Crass, hi. 5-6 fx.
iii.
;
Zygnemace.e.
5.
Spirogyra arcta (Ag.) Kiitz. Tab. Phyc.
Eur. Alg.
cell,
lat.
iii.
veget.
34-38
zygosp. 27
6.
Forma
239.
/x.
/m
;
cellulis fructiferis
longit. 1^-plo
major
;
v.
t.
non
21
Rabh.
;
inflatis.
long, zygosp.
B'l.
Crass.
48-50
/x,
Inkuyuni, Kamassia.
S. setiformis (Roth) Kiitz. Species Alg.
Journal of Botany.
— Vol.
34,
442
[Sept, 1896.]
;
Rabh. Fl. Eur.
2 c
ALGiE FBOM CENTRAL AFRICA.
378
Alg.
Crass, cell, veget. 108-125 /x; long, zygosp. 1412iG.
Mwangadan Eiver, S. of Fuladoga.
zygosp. 100-111 [x.
iii.
154
lat.
fx,
7. S. TERNATA Riparti in Bull. Bot. Nat. Fr. torn, xxiii. 1876,
162; Petit, Spirog. Knvir. Paris, 26, t. viii. figs, 4-7. Crass, cell.
veget. 54-57 /x; longit. 1-2^-plo major; crass, cell, fruct. usque
75 [x; long, zygosp. 78 /x, lat. zygosp. 48-54 [x. Inkuyuni, Kamassia.
The diameter of the filaments and the dimensions of the zygospores are a trifle small for this species, and come near those of
S. ncijlecta (Hass.) Kiitz., but as nearly all the fructiferous cells are
abbreviated and fairly inflated,
it
evidently belongs to S. ternata.
The latter species seems to have been separated only on account of
its more inflated and abbreviated fructiferous cells.
8. S. DUBiA Kiitz. Tab. Phyc. v. t. 24; Eabh, Fl. Fump. Ah/.
iii.
243
cell,
Wolle, Frcshw. Alg. U. S. 220, pi. cxxxv. f. 11-12. Crass,
43-48 /x; long, zygosp. 57-58 /x, lat. zygosp. 38-41 /x.
;
veget.
Desmidiack^.
Closterium Leibleinii Kiitz. Synops. Diatom, in TAnnfca,
Ealfs, Brit. Desm. 167, tab. xxviii. fig. 4.
Lat. 18 fx.
1833, 596
Inkuyuni, Kamassia.
10. C. LiTTORALE Gay, Essai Monog. Conj. 75, t. ii. fig. 17
Note sur les conj. mid. France, Bull. Soc. Bot. France, 1884, 339.
Var. CRASSUM, n.var. (Fig. 18). Var. cellulis multe crassioribus.
Long. 218 /x lat. 31 /x. Inkuyuni, Kamassia.
The ''Closterium Leibleinii^ forma" described and figured by
Borge (Siissw. Chlor. Archangel, Bihang till R. Svenska Vet.-akad.
Handl. Band 19, 1894, 16, figs. 9, 10) belongs rather to C. littorale
Gay than to C. Leibleinii Kiitz.
Ralfs, Brit. Desm. 79,
11. EuASTRUM vERRucosuM Ehmb.
Long. 71 /x; lat. 69 /x lat. isthm. 16 /x. Mwantab. 11, fig. 2.
gadan River, S. of Fuladoga.
9.
;
;
;
;
;
12. E. spiNULOSUM Delp. '''africanum Nordst.
9,
63
t.
xvi. fig. 16.
lat.
/x;
Long. 68, 79, 70, 71, 77
/x
isthm. 14-5, 15, 14-5, 15-5, 16
Mwangadan
/x
Be
Alg. et Char. i.
63-5, 64, 61, 61,
crass. 38-5, 35 /x.
lat.
;
;
E. submediocre,
13. E. hexagonum, nov. sp. (Fig. 10).
li-plo longius quam latum, medio profundissime constrictum, sinu
angusto-lineari extremo ampliato; semicelluhc subtrapezic^, angulis
rotundatis, lateribus biundulatis, elevationibus basalibus majoribus,
apicibus retusis in medio, elevationibus granulatis, in medio ad
basin cum aunulo granulorum majorum 7-8 circa granula 3 cena vertice visse oblongo-elliptic^, ad medium utrobique
tralia
a latere visae pyramido-ovatfe, tumore basali utrobique.
tumidffi
Long. 48, 48-5, 53, 49 /x lat. 40, 40, 46, 40 /x; lat. isthm. 10, 10-5,
Mwangadan River, S. of
13, 9-5 fx; crass. 22, 22-5, 24, 21 /x.
;
;
;
Fuladoga.
This may be compared with Cosmarium alatum Kirchn. {Alg.
Schles. 153) and its var. gostyniense Racib. (Nonn. Desm. Polon. 17,
tab. xi. fig. 17), from which it differs in being twice as large, in
having fewer and larger granules, and in its different apex.
;;;
ALG^ FROM
14.
12-13.
379
CENTRAX, AFRICA.
CosMARiuM PECTiNoiDEs Wolle, Desin. U. S. 88,
Long. 57 /x; lat. 43 /x; lat. isthm. 15 /x;
Mwangadan
(Fig. 9).
pi. xiv. figs.
crass.
27
/x
Eiver, S. of Fulacloga.
The nearest
species to this is C. hinum Nordst. in Wittr. &
1880, no. 383, which differs chiefly in its linear
sinus, its rectangular basal angles, and its truncate apex.
The
close resemblance between these two species seems to have escaped
Nordst.
AJfi. E.vsicc.
the notice of
some previous observers who have had occasion
to
refer to C. biniiui.
15. C.
Mwangadanense, nov. sp. (Fig. 11). C.
quam latum, profunde constrictum,
li-plo longius
extremo subampliato
semicellulre subsemicirculares
;
submediocre,
sinu lineari
cum
apicibus
truncatis, angulis basalibus rotundatis, lateribus leviter biundulatis,
elevationibus granulatis, granulis intra marginem subter elevationibus, in ceutro cum tumore magno granulorum majorum
a vertice
Long. 49 /x
visie lata) ellipticfe, cum tumore ad medio utrobique.
lat. 41 /x
lat. isthm. 11*5 /x.
The isolated patches of granules of this species are very charac;
;
teristic.
IG. C.
suBcosTATUM Nordst. in Wittr. & Nordst.
Alrj. et
(Edog.
in Ital. et Tyrol. 37, taf. xii. fig. 13.
Forma minor
oribus.
crass. 11-5
/x.
Forma minor,
(Fig. 15).
Long. 21-5-23
/x
Mwangadan
17. C. Blyttii Wille, Bidrcuj
25, tab.
i.
fig. 7.
Long. 21
crenis lateralibus pauci-
lat. isthm. 4-2-4-8
lat.
;
/x
;
18-19
til
lat.
/x
;
/x
Kundsk. om Norges Ferskv. Ahj.
19 /x; lat. isthm. 6 /x. G. Las-
chan, Leikipia.
18. C. PUNCTULATUM Breb. var. ornatum Istv. Schaar. Diag.
Algar. Nov., Notarisia, 1886, 237. Forma cum granulis radiatim dispositis.
Long. 21 /x
lat. 18 /x
lat. isthm. 6 /x.
Mwangadan
;
;
19. C. Phaseolus Breb.
Ralfs, Brit. Desm. 106, tab. 32, fig. 5.
Long. 27 ft lat. 26 /x lat. isthm. 7*5
crass. 14-5 /x.
;
;
{jl
;
;
C. trochiscum, nov. sp. (Fig. 12).
C. parvum, l|-plo
quam latum, profundissime constrictum, sinu angustolineari extremo ampliato
semicellula3 oblongo-rectangulares, angulis leviter rotundatis, angulis superioribus subincrassatis
a
vertice visse ellipticas, tumoribus parvis binis ad medium utrobique
membrana glabra. Long. 22-5 /x lat. 21 /x; lat. isthm. 4*5 /x;
crass. 13 /x.
20.
longius
;
;
;
21. C. rectangulare
C. gotlandicum Wittr.
Grun. in Rabh. Fl. Europ. AUj.
iii. 166.
Gott. och 01. Sotv. Ahj. 60, t. iv. fig. 14.
Var. AFRicANUM, n.var. (Fig. 14).
Var. semicellulis multe altioribus, lateribus inferioribus divergentibus, lateribus superioribus
longioribus, apicibus angustioribus, isthmo angustiori.
Long.
Om
31-35 /x; lat. 24-25 /x; lat. isthm. 6-7*5 /x; crass. 15 /x. Mwangadan River, S. of Fuladoga.
It differs from C. rectangulare Grun. var. Cambrense (Turn.)
2 c 2
;
ALGiE FROM CKNTRAL AFRICA.
380
gotlandicum Wittr. v. Cambrense Turn. Desmid Notes, NatuNov. 1893, 345, fig. 7] in the different inclination of the
inferior lateral margins, the longer superior lateral margins, and
the narrower apex.
[=0.
ralist,
C. minutum, 1^-plo
C. globulatum, nov. sp. (Figs. 7-8).
quam latum, profunde constrictum, sinu lineari extreme
semicellulae semicirculares angulis basalibus leviter
subampliato
22.
longius
;
membrana crassa, minute
a vertice visae circulares
rotnndatis
punctata. Long. 17 /t lat. 13-5 /x; lat. isthm. 4-5 /x. Mwangadan
It differs from C. affine Racib. (Desm'uhja iv podrdzy na okolu
;
;
;
ziemi,
its
Krakow, 1892,
much narrower
25) in its deeper constriction,
thicker membrane, and circular
3, tab. vi. fig.
sinus,
its
vertical view.
subvenustum, nov. sp. (Fig. 17).
quam latum, subprofunde constrictum,
C. parvum, paullo
sinu lineari
semicellulre late truncato-pyramidat^, angulis rotundatis, lateribus tria vertice viste elliptica? ad medium
undulatis, apicibus retusis
a latere visae late pyramido-ovats
utrobique tumore prasditre
membrana punctata. Long. 36-5 /x lat. 32-5 /i; lat. isthm. 15 n;
crass. 22 /x.
This differs from 0. venustnm (Breb.) Arch. [= C. Cawhricuin
C.
23.
longius
;
;
;
;
Cke. & Wills] in
in the
its
much
median tumours
24.
broader
cells,
its
broader isthmus, and
of the vertical view.
Staurastrum nephroideum,
vum, paullo longius quam
nov. sp. (Fig. 13).
S. par-
profunde constrictum, sinu
semicellulre
angusto extremo subampliato extrorsum valde aperto
a vertice vistB triangulares
subreniformes, dorso multe convexo
membrana subcrassa
lateribus concavis, angulis subtruncatis
densissime punctata. Long. 38 /a; lat. 35 /x; lat. isthm. 11'5 /x.
latum,
;
;
;
25.
subdilatatum, nov.
S.
sp.
(Fig.
S.
16).
parvum, paullo
quam
latum, profunde constrictum, sinu aperto extremo
semicelluhie elliptico oblonga>, apicibus subtruncatis
a
rotundato
vertice visa? triangulares, lateribus concavis, angulis rotundatis
membrana dense et delicate granulata. Long. 26-5-27'5 /x; lat.
23-25 /x; lat. isthm. 9-5 /x. Mwangadan River, S. of Fuladoga.
This Staurastrum appears to be nearest to S. dilatatum Ehrnb.,
from which it differs in being relatively longer in proportion to its
breadth, and in having more numerous granules, which are not
arranged in transverse series across the angles.
longius
;
;
;
Pediastre^.
26.
Pediastrum Boryanum (Turp.) Menegh.
187, tab. 31,
;
Ralfs, Brit. Desm.
fig. 9.
Forma cellulis periphericis
Var. granulatum (Kiltz.) A. Br.
processibus delicatissimis instructis. Diam. cell, peripher. 18-21 /x.
.
ALG^ FROM CENTRAL
;
381
AFRICA.
SORASTRE^.
27. CcELASTRUM sPH^RicuM Niig. [C. N(i[/eUi Eabh. Fl. Earop.
iii. 79, pro parte.]
Alfjar.
Moras,
C. coenobiis sphfcrici?, e
nov. sp. (Fig. 4).
16 compositis; cellulis globosis verrucosis, verrucis
emarginato-truncatis iu toto ambitu cellubie uniuscuj usque 9-10.
Diam. cosnob. 35-3G ji diam. cell. 9-5-10 /x. Mwangadan River,
28. C.
cellulis confertis
;
S. of
Fuladoga.
Tbe nearest species to tbis is C. scahmin Reinscb (Contrib. Flor.
Alg. Aq. dulc. Fremont. Bona; Spei, Journ. Linn. Soc. Bot. xvi. 232,
pi. vi. fig. 3), from wbicb it differs in the more crowded cells, which
are ornamented with
warts.
more numerous and
distinctly emarginate
Protococcace^.
ampla (Kiltz.) Eabh. Flor. Europ. AUj. iii. 29.
Mwangadan Eiver, S. of Fuladoga,
Mwangadan Eiver,
30. G. RUPESTRis (Lyngb.) Eabh. I. c. 30.
S. of Fuladoga.
31. Ehaphidium polymorphum Fresen. var. aciculare (A. Br.)
Eabh. I.e. 45. Mwangadan Eiver, S. of Fuladoga.
29. Glceocystis
32. ScENEDESMUs OBLiQuus (Turp.)
Ealfs, Brit. Desm. 191, tab. 31, fig. 14.
Klitz.
S.
acntuH
Mwangadan
Meyen;
Eiver, S. of
Fuladoga.
33.
fig.
S.
12 a-f.
Ealfs,
quadricauda (Turp.) Breb.
;
I.e.
190, tab. 31,
Scytonemace.e.
34.
ScYTONEMA
heterocyst. 10
sp.
Crass.
x 11*5-13
fil.
18-20
/x;
10-11
crass, trich.
//
/x.
SiROSIPHONIACEiE
Wood, Prodr. Freshw. Alg. N. Amer.
Contrib. Hist. Freshw. Alg. N. Amer., Smithsonian Coutrih. to
Knowledge, 44, tab. iii. fig. 6; Bornet et Flahault, Bevis. des Nostoch.
Heterocyst. iii. 80.
Crass, fil. infer. 2 jx; crass, cell. sup. 3-5-4-5 //;
diam. heterocyst. 6-8 /x (Figs. 1-2). Inkuyuni, Kamassia.
The cells of the plants examined were rather smaller than the
all the heterocysts were lateral, and
average for this species
mostly stalked. The figures given by Wille [Didriig til Sgtldinerik.
35. NoSTOcHOPSis LOBATUS
127
;
;
AlgjI. tail. 1, f. 1-19) show much slighter intercellular constrictions,
and the branching seems very different to that of the African plant.
Lyngb YE ^.
36. OsciLLATORiA LiMosA Ag. [OscHhiria Frfclichii Kiitz. O. nigra
Ag.]
Crass, fil. 15-15-5 /x.
;
37. Arthrospira platensis (Nordst.) Gomont, Phonograph, des
Spiral ina Jenneri Hass. fi. jdatensis
Oscillar. 2G7, pi. vii. fig. 27.
Nordst.
in
Wittr.
et
Nordst. Alg. Aq.
Dale. Exsicc. fascic. xiv.
ALG^ FROM CENTRAL
382
AFRICA.
Crass, fil. 7'7-ll*5 /x; long. cell. 3-8-5-5 /x
diain. spir.
anfractibus 40-48 /x inter se distantibus (Figs. 5-6).
Lake Losuguta (water with sulphides).
This is a most interesting alga, having been recorded hitherto
only from Uruguay.
The African plant is a little stouter, and has
the spirals somewhat closer together; the habitat "water with
sulphides " is also remarkable.
no. 679.
42-46
;
/x;
ChROOCOCCACEvE.
Chroococcus turgidus (Kiitz.) Niig. Gatt.
Eabh. Fl. Europ. Alg. ii. 32. Frotococcus tw(/ U us
38.
i.
5,
V.
t.
integ.
Diam.
1.
f.
cell,
15-25 x 20-29
/x.
sine integ. 5-5-9-5
Mwangadan
;
Kixiz. Tab. Vlujc.
x 10-5-17'5
/x,
cum
Coelosphaerium confertum, nov.
39.
globoso parvo
46
Einzell. Alg.
C. thallo
sp. (Fig. 3).
minutis periphericis, subglobosis angulariglobosisque, plerumque quaternis, confertis.
Diam. thall. 125 /x;
diam. cell. l-8-2'4 /x. Mwangadan River, S. of Fuladoga.
t.
;
cellulis
40. Merismopedia glauca (Ehrnb.) Niig. Gatt. Einzell. Ahj. 55,
D, f. 1
Rabh. Fl. Europ. Alrj. ii. 66. Diam. cell. 2 /x.
i.
;
Inkuyuni, Kamassia.
M. PUNCTATA Meyen
41.
Mwangadan
;
Rabh.
Diam.
I.e. 57.
4-4-5
cell.
/x.
DlATOMACE^.
(W. Sm. Brit. Diat.
42. SuRiRELLA ovALis Breb.
fig.
43.
N. 24]
A
Mwangadan
68).
S.
.
33,
i.
t.
ix.
ii.
88,
ANGUSTA Kiitz. [S. apkntlata
Inkuyuni, Kamassia.
44. Cymatopleura Solea
broad form long. 138 p;
;
W. Sm.
W. Sm.
(I.e.
max. 45
(W. Sm.
lat.
45. Epithemia gibba Kiitz.
Mwangadan
i.
36, tab. x.
fig. 78).
Inkuyuni, Kamassia.
p.
/.
Brit. Diat.
c.
12,
tab.
i.
fig.
13).
Inkuyuni, Kamassia.
46. E. soREx Kiitz. (W. Sm. I. c tab. i.
Inkuyuni, Kamassia.
fig. 9).
Mwangadan
47. E. ventricosa Kiitz. (W. Sm. /. c. tab. i. fig. 14).
Mwangadan River, S. of Fuladoga. Inkuyuni, Kamassia.
48. Eunotia pectinalis Dillw.
Eabh. FL Europ. Ah/ar. i. 73.
;
[Himaiitidium pectinale Kiitz.
W. Sm. Brit. Diat. ii. fig. 280.]
Lake Losuguta.
Gr. Laschan, Leikipia.
Var. undulata (Sm.) Ralfs Eabh. Fl. Europ. Ah/, i. 74. [Hi;
;
mantidium undulaium
W. Sm.
Brit. Diat.
ii.
fig.
281.]
G. Laschan,
Leikipia.
49.
Cymbella Gregorii Ralfs
Europ. Ahj.
i.
79).
Mwangadan
50. C. VENTRICOSA Ag. (Eabh.
convexa.
51.
(Pritch. lufus. 876
Eiver, S. of Fuladoga.
I.
c.
82).
Forma
;
Eabh. Fl.
dorso subelato-
CoccoNEMA CYMBIFORME (Kutz.) Ehmb. (W. Sm. Brit.
G. Laschan, Leikipia. Lake Baringo.
tab. xxiii. fig. 220).
Diat.
ALG^ FROM CENTRAL
Amphora coffe^eformis
Lake Baringo.
52.
i.
89).
290).
(Ag.) Kiitz. (Rabh. F(. Eurup. Ahj.
W. Sm.
Odontidium mutabile
53.
fig.
Diat.
(Brit.
17, tab. 34,
ii.
Lake Bariugo.
(W. Sm.
54. Fragilaria virescens Ealfs
297).
383
AFRICA.
22, tab. 35,
I.e.
fig.
55. Synedra PULCHELLA Klitz. (W. Sm.
50. S. Vaucheri.e Kiltz. (W. Sm.
Inkuyuni, Kamassia.
I.e.
70, tab. 11,
i.
70, tab.
fig.
84).
fig.
99).
57. S. SPLENDENS Kixtz. (Rabh. Fl. Europ. Air/, i. 134).
radians W. Sm. I.e. 71.]
Mwaiigadan River, S. of Fuladoga.
[S.
59. NiTzscHiA
105).
Mwangadan
Amphioxys
Mwangadan
G2. N. TENUIS
guta.
G3.
188).
W. Sm.
W. Sm.
Navicula limosa
Mwangadan
64. N. RosTRATA
Mwangadan
GG. N.
W. Sm.
(I. c.
{I.e.
[Brit. Diat.
tab.
13,
39, tab. 13,
fig.
fig.
{I.e. 40, tab. 13, fig.
(Kiitz.)
Ebmb.
Grun. (Rabh.
(Rabh.
I.e. 197).
Ehrub. (W. Sm.
40,
i.
t.
13, fig.
lOG).
Likuyuni,
110).
Likuyuni,
Lake Losu-
111).
FL
Europ. AUj.
i.
Lake Bariugo.
Brit. Diat.
53,
i.
t.
xvii. fig.
BoMBus (Ehrnb.)
Mwangadan
Forma
[Blat. ii. 89).
65. N. DicEPHALA
157).
11,
60. N. PARVULA W. Sm.
Kamassia. Lake Losuguta.
Gl. N. LINEARIS
Kamassia.
e.
W. Sm.
58. Tryblionella levidensis
apicibus subobtusis.
/.
Kiitz.
(Rabh. Fl. Europ.
AI<j.
i.
204).
[.V. vunntula W. Sm.
67. N. PYGM.EA Kiitz. (Rabh. I.e. 184).
t. xxxi. fig. 274.]
Brit. Diat.
68. N. MAJOR Kiitz.
Leikipia.
[Pinnularia major Rabenh.]
69. N. viRiDis (Nitzsch.) Kiitz.
[Pinnularia
G. Laschan,
Ehrnb.]
viridis
70. N. BOREALis (Ehrnb.) Kiitz. [Pinnularia borcalis Ehrnb.
Brit. Diat. ii. 94; Rabh. Fl. Eur. Alg. i. 216.] Inkuyuni,
;
W. Sm.
Kamassia.
71. N. Tabellaria Kiitz. [Pinnularia Tahellaria'EAwwh.; Pinnularia leptogongijla Ehrnb.] G. Laschan, Leikipia.
72. N. Rabenhorstii Ralfs.
[Pinnularia interrupta Rabenh.]
G. Laschan, Leipipia. Mwangadan River, S. of Fuladoga.
73.
fig.
Stauroneis anceps Ehrnb. (W. Sm. Brit. Diat.
190).
Forma
polls subcrassioribus.
Mwangadan
i.
GO,
t.
xix.
River, S. of
Fuladoga.
74.
218).
Pleurosigma Spencerii (Quek.) W. Sm.
Mwangadan
{I. c.
68,
t.
xsii. fig.
NEW OR
384
CRITICAL BRITISH MARINE ALG-E.
75. GOMPHONEMA TENELLUM Ktltz.
243).
Inkuyuni, Kamassia.
(W. Sm.
76. G. CAPITATUM Ehrnb. (W. Sm.
lukuyuni, Kamassia.
I.
77. Rhoicosphenia ? contracta (Kiitz.)
292).
i.
Explanation of Plate
a, a'
b
=
=
front view (a fronte visa).
vertical view (a vertice visa).
Yig?,. 1-2.
Fig.
3.
,,
4.
Figs. 5-6.
7-8.
,,
Fig.
9.
,,
10.
,,
11.
„
12.
,,
13.
„
,,
14.
15.
,,
16.
„
17.
,,
18.
c
d
Nostochopdxlohatus VfooA.
=
=
c.
I.
t.
Rabh.
C.
80,
t.
xxviii.
Xxix.
fig.
fig.
237).
(Fl. Europ. Ahjar.
.361.
side view (a latere visa).
basal view of semicell (a basi visa).
/(, stalked heterocysts
/('sessile
heterocysts.
Cvclosplucrinm confertum, n. sp. A few of the cells. 830/1.
Ccelastruiii Morns, n. sp.
520/1.
Arthrospira plutemis (Nordst.) Gomont. 520/1.
Cosmarium plohulatum, n.s]). 520/1.
pectinoidcs Wolle.
520/1.
„
Euastrum hexagonnm, n. s^j. 520/1.
Cosmarium Mivdiuiadancni^c, n. sp. 520/1.
trochiscum, n. sp.
520/1.
„
Staurastrum nephroideiim, n. s^. 520/1.
Cosiiiariiim rectaiujitlare Gvun. vsLV. afric(nium, n.\a.Y.
520/1.
subcostatiiin Nordst. forma minor.
,,
520/1.
Staiirastriim siiJtdilatatum, n.S]}.
520/1.
Cosmarium subrenustum, n. sp, 520/1.
ClosteriiDii Uttorule Gay, yiiv. crassiuii, n.\a,x.
520/1.
NEW OR
By E.
520/1.
;
MARINE ALG^.
BRITISH
CRITICAL
A. L. Batters, B.A., LL.B., F.L.S.
The
species recorded iu the accompanying list are, so far as
aware, new to Britain and, with the exception of the Lithothamiiia, nearly all of them have been added to our marine flora
during the last few months, principally through the exertions of
Mr. George Brebner, who still continues his research-work at
Plymouth with the most satisfactory results. For the identification
of the Lithothmmiia I am indebted to Mr. M. Foslie, of Trondhjem.
I
am
;
Oscillatoria rosea = Osciilana rosea Crn. Flor. Finist. 113,
gen. 16.
Trichomata deep purple-red, from 2 to 4 mm. long
and from 4 to 5 /x in diameter, more or less bent and twisted,
apical
slightly curved at the apex
cells about as long as broad
cell sharply pointed.
On a polyzoan attached to a piece of broken
bottle dredged from deep water, "Queen's Ground," Plymouth,
G. Brebner.
When fresh the trichomes of this species are of a clear purplered colour, which soon fades when the plant is mounted in Dean's
medium. In all respects the British specimen agrees with the figure
and description of the species given by the Crouans.
1.
pi. 2,
;
;
2.
Symploca atlantica Gom. Manor/.
Erect filaments from 800 /x to
nov. var.
purpurea,
long and from 6 to
Oscil. 129, var.
1
mm.

Journal of botany, British and foreign

Transcription

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