Sooty Tern, Sterna fuscata of Japan / 日本のセグロアジサシ

B
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l
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agawaP
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.M
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.N
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.13March1982
31
T h e First Zoeal Stages of P
u
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e
t
t
i
aq
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ahαem
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e
r
i
q
u
a
d
r
i
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e
n
s(DEH A AN) and Mαc
(TEMMINCK) (Crustacea, Brachyura, Majidae)
Kensaku MURAOKA
ヨツハ モガ ニと タ カ ア シ ガ ニ の第
1期 ゾエ ア に つ い て
クモガニ科 ヨツ ハモガニ Pugettia quadridens quadridens (DE HAAN） とタカ アシ
ガニ Macrocheira kaemρ•Ie
r
i (T EMMINCK〕の 2種の雌 ガニを 室内で飼育 し
， 第 1期ゾ
エアを得 ることができた。 これ ら 2種の幼生の外部形態を 観察す るとともに， すでに報告
されている同種の幼生と の比較観察 をお こなっ た。
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B
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.KanagawaP
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.M
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.N
o
.13March1982
33
s
p
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n
ei
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b
o
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tt
w
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gtho
f antenna.Thel
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t
e
r
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ls
p
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n
ei
ss
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o
r
t
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r
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y
e
sa
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o
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t
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n
t
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u
l
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e
a
rs2l
o
n
ga
e
s
t
h
e
t
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s
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sand1s
e
t
a.
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o
n
s
i
s
tso
fas
pi
n
o
usp
e
d
u
n
c
l
e
,endopod ande
x
o
p
o
d
. Thes
pi
no
u
s
p
e
d
u
n
c
l
ehast
h
erowso
fs
p
i
n
u
l
esal
ongt
h
el
a
te
r
almargi
n.Theendopodi
ss
m
a
l
l
.
Theexopod3unequals
p
i
n
eson i
tsdi
s
t
alp
o
r
t
i
o
n
.
The m
a
x
i
l
l
u
l
e cons
i
s
t
so
ft
h
ec
o
x
aland bas
a
l endi
t
es and e
n
d
o
p
o
d
. The b
i
s
e
gme
n
t
e
dendopod i
sf
u
r
n
is
hed wi
t
h 1s
et
a on t
h
ep
r
oxi
m
a
ls
e
gmentandwi
t
h4
termi
naland2subterminals
e
t
a
eon t
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ls
e
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e
n
t
.
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i
l
l
ac
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n
s
i
s
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ft
h
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o
x
a
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a
s
a
le
n
d
i
t
e
s
,endopodands
c
aphogna
t
hi
te
.
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i
l
o
b
e
dc
o
x
a
l and b
a
s
a
l endi
t
e
sb
e
a
r4
, 4and 4
,5s
e
t
a
er
e
sp
e
c
t
ivel
y. The
b
il
o
b
a
t
e endopod b
e
a
rs3s
et
ae on e
a
c
hl
o
be and i
ts margin a
r
ec
o
v
e
r
e
dw
i
t
h
nume
r
ousf
i
n
eh
a
i
rs
. Thes
caphognathi
t
eb
e
a
rs1
5marginalplumoseh
a
i
rs
.
Thef
i
r
s
tm
a
x
i
l
l
i
pe
dhasal
ongendopodands
l
e
n
d
e
rexop
o
d
.Thef
i
v
es
e
gmented
endopod b
e
a
rsa s
et
a
t
i
o
no
f3,2,1
,2
,5
. The exopod b
e
a
r
s 4 plumose n
a
t
a
t
o
ry
h
a
i
r
son t
h
ea
p
i
c
alt
i
p
.
Thes
e
c
ondm
a
x
i
l
l
i
p巴dhasas
h
o
r
tendopod and al
o
n
gexopod. Thet
h
r
e
es
e
g
巴t
a
ti
o
no
f1
,1
,6
. The exopod be
ar
s4plumose h
a
i
rson
me
n
t
e
dendopod hasas
i
tsa
p
e
x
.
The abdomen c
o
n
s
i
s
t
so
ff
i
v
es
e
gments and onet
el
s
o
n. Thes
e
c
ondand t
h
i
r
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abdominals
e
gmentsb
e
a
rap
a
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ro
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ne
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alm
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r
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ame s
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f M.
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kaem1
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he m
a
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ist
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nt
h
es
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l formulao
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h
eendopod
Tab
l
e1). Tanase (
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7)obs
ervedt
h
edevelopment o
f
o
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he s
econd m
a
x
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l
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d〔
l
a
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et
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ss
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s and g
i
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es t
h
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e both endopodso
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ge. Heprobab
l
yoverlooked2 s
司
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r
m
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nals
e
t
a
e on t
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ed
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als
egment o
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econd m
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. I
na
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lo
ft
h
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i
rs
tz
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ft
h
es
ame
36
Th
巴 f
i
r
s
tz
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p
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re
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ab
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,with theexception o
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t
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r
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a
l
, theendopodofthemaxilla
sp巴c
ist
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l s巴gment, and th巴 endopod o
f the second maxillip巴d
bears 6 setae on the d
c
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t
s of three segments; the proximal and middl色 segmentseach b巴ar 1s巴t
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and thed
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l one bears6s
Acknowledgements
I would l
i
k
et
o thank Dr. T. Sakai, President o
f the Japanese Carcinological
l
s
ol
i
k
et
othankMr.H. Matsumura,
S
o
c
i
e
t
y
,f
o
rh
i
svaluablesuggestions
.Iwoulda
Kanazawa Aquarium, f
o
r providing me with the larvae of M. kaem
ρ＇feη・
Literature cited
9
2
7
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fbrachyuranz
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呂l
s
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g
巴 S
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.
AIKAWA, H. 1
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