8 7
S e c t i o n ASTACINI, Lair.
G enus G R IM O T E A . Lea ch , D ie t, des Sciences N a t. 18. p . 50.
17 . G r im o t e a g r e g a r ia . Leach. Fig. Zoologìe de la Coquille, Atlas, Crustacés,
“ T h e y w e re se e n in g r e a t n um b e rs floa ting p a s t th e ship d u r in g a c a lm , off S t. F r a n c is c o ,
D e c . 1 .”—N o te hy M r . L a y .
G enus P O R C E L L A N A , L a tr .
iaits, »Kini6«« supra co/rinalis.
T h e c a r a p a c e is ru g o s e , g ro o v ed a t tlie sid e s, a n d a lo n g th e p o s te rio r m a r g in ; w ith tra n sv e rs e
lin e s a n te rio rly , a n d o b liq u e lin e s ov e r tb e b r a n c h ia l r e g io n s : ih e ro strum is a d v a n c e d , p o in te d ,
g ro o v ed a lo n g th e c e n tre , a n d u n i - d e n ta te a t th e sides. T h e cheltB a re e q u a l, la rg e , com p re ssed ,
s lig h tly s c a b ro u s su p e rio rly , smooth b e n e a th ; tb e cubitus on its in n e r a sp e c t h a s a sin g le to o th , th e
carpus f o u r ; th e form o f th e manus w h e n c losed is la n c e o la te ; above i t is e a r in a te ; th e o u te r m a rg in
is slig h tly a n d irre g u la rly s e r r a te ; th e d ig its a re u n a rm e d , a re b e n t a t th e ir e x tr em itie s , a n d close
w ith o u t in te rv e n in g sp a c e . T h e fem o ra o f th e se co n d , th ird , a n d fo u rth p a irs o f c law s a r e c om p re s s ed ,
w ith th e su p e rio r m a rg in sp in o u s a n d c ilia te ; th e o th e r jo in ts a re ro u n d e d , th e la s t very sh o r t, a n d
te rm in a te d b y a s im p le c u rv e d claw. T h e coxts o f th e th i rd p a ir a re p e r fo r a te d , th e sp e c im e n b e in g
a female.
T h e e x te rn a l an ie an « a re as lo n g a s th e cAete; th e firs t jo in t h a s a tr ia n g u la r p la te in te rn a lly , th e
se cond jo in t h a s a sp in e in te rn a lly a t th e b a s e , th e la s t jo in t is s e ta c e o u s . T h e in te r n a l antenna have
a sp in e e x te rn a lly a t th e ir base. T h e fla g r um o f th e fo o t-p a lp e is s im p le , s ty lifo rm , n o t e x te n d in g
beyond" th e m id d le o f th e th ird jo in t o f th e la tte r .
T h is spe c ie s is a n a tiv e o f th e L ew I s la n d s o f th e P a c ific O c e an.
F i g . 1 . P o r g e l l a n a C O C C IN E A , {dorsal aspect.)
1 a. Pedipalpus externus.
1 h. Cauda fceminw.
2. PoRCELLANA C O C C IN E A , FC EM IN A . (ventral aspect.)
G enus C R A N G O N , Leach, Malacostr. B r i t .
1 9 . C r a n g o n v u l g a r i s . Fabr., En t. S y s t. Suppl. p . 4 \0 . Leach, Malac. P o d .,
B r it. tab. 27. B.
S p e c im en s we re ta k e n a t M o n te rey , C a lifo rn ia , w h ich d iffe r in n o o th e r r e sp e c t from o u r com m on
species, th a n in h a v in g th e m id d le lam e lla o f th e ta il a l i t t l e m o r e n a r row and pointed.
20 . C r a n g o n B o r e a s . Fabr., Suppl. En t. p . 4 0 9 .
Cancer Boreas. Phipps, Voyage, p . 1 9 0 . tab. 1 2 . Jig. 1 .
Crangon Boreas. Sabine, Zool. App. to Parry’s Voyage, p . 2 ^ .
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