\.....
ñi. ■
08 CRUSTACEA.
21. C r an go n s a l e b r o s u s . n . s .
Crang. salebrosiu, thorace sepiem-carinato, segmenlis biníi spinis utrinque termitiaiis.
Long. Corp. unc. 4. Color ftu c u s .
Y o u n g and fu ll-g row n sp e c im e n s o f th is sp e c ie s w e re t a k e n a lo n g tb e shore s o f K am ts c h a tk a .
T h e g en e ra l h a b it o f th e b o d y is g ra n u la te an d s c a b ro u s . T h e thorax is s e v e n - c a r in a te ; th e la te r a l
c a r in a s e rra te , th e in fe rio r o ne s in d ic a te d b y tu b e r c le s lo n g itu d in a lly d isp o s e d , th e m id d le o ne w ith
tw o o r th re e s e r r a te , b u t n o t v e ry a c u te o r p ro d u c ed sp in e s ; a la te r a l carina is c a r r ie d on b y tu b e r c le s
a lo n g th e a b d om in a l se gm e n ts . I t m ay b e r em a rk e d , th a t th e s e c a r in a a re n e a te r a n d m o re d is tin c t
in th e y o u n g e r sp e c im e n s , b e in g c o n fo u n d e d w ith n e ig h b o u rin g tu b e r c le s in th e fu ll-g row n a n im a l.
T h e ro s trum is sh o rt, d e p re s s e d , g rooved on e a ch s id e . T h e r e is a s h o r t sp in e a t th e a n te r io r m a rg in
o f th e thorax b e n e a th th e e y e , a n d a la rg e a n d c o n s id e rab ly p ro d u c e d o n e a t th e in f e r io r an g le ; o lh e r
sp in e s e x is t a t th e com m e n c em e n t o f th e c o r in « : th e r e a r e fo u r sp in e s b en e a th th e thorax, a s in Crang
on B o rea s. A s iu th a t spe c ie s a lso , th e antenna d o n o t e x c e e d th e len g th o f th e thorax . T h e ab d om in
a l s e gm e n ts te rm in a te b e low in tw o sp in e s , e x c e p tin g th e la s t, wh ich ha s a s in g le sp in e a n d a d o u b le
carina a lo n g th e dorsum. T h e u ltim a te jo in ts o f th e fo u r th a n d fifth p a irs o f f e e t a re s le n d e r , and
c u rv e d , a n d te rm in a te a cu te ly .
P l a t e X X V IT . F ig . 1. C r a n g o n sa l e b r o s u s .
22. C r a n g o n l a r . n. s.
Crang. la v is, rostro en
Long. Corp. unc. 3 ^ .
iato, oculorum pedunculis approximaiis porrectis.
O n e la rg e a n d som e sm a lle r sp e c im en s o f th is sp e c ie s we re t a k e n in th e A r c tic s e a s , b u t th e p r e c
is e s itu a tio n is n o t in d ic a te d . T h e len g th o f th e la rg e r sp e c im en is fo u r in c h e s . I t s e x te r io r is
sm o o th a n d sh in in g . T b e thorax h a s tw o sp in e s b e h in d th e ro strum , o n e o n e a c h s id e a t th e a n te r io r
m a rg in , a n d a n o th e r som e w a y b e h in d th e s e . T h e ro s trum is e le v a te d , b u t tru n c a te a t th e a p e x , o r
em a rg in a te ; th e ey e s a re s itu a t e d im m e d ia te ly b e n e a th it , th e ir p e d u n c le s ly in g p a ra lle l w ith e a c h
o th e r, a n d in th e s am e lin e w ith th e b o d y . T h e s e co n d jo in t o f th e su p e r io r a n te n n a is d ila te d a n d
sp in ifo rm e x te rn a lly , th e seta p ro je c ts v e ry little b e y o n d th e lamina o f th e in fe rio r a ntenna; th e s e , as
in th e p r e c e d in g s p e c ie s , n o t e x c e e d in g th e le n g th o f th e th o r a x . T h e u ltim a te jo in ts o f th e fo u rth
a n d fifth p a ir s o f le g s a re c om p re s s ed a n d la n c e o la te . T h e a b d om in a l s e gm e n ts a re s im p ly c illa le
in fe r io r ly ; th e first five a re e a r in a te ahove , th e la s t h a s a d o u b le carina wh ich is c o n tin u e d a lo n g th e
m id d le lamella o f th e ta il, w h e re tow a rd s th e e n d th e y be com e in d ic a te d b y la te r a l sp in e s .
P l a t e X X V III. F ig . 1. C r a n g o n l a r .
G enus H I P P O L I T E , Leach, Malacostr. P o d . B r i t .
23. H i p p o l i t e a c u l e a t a .
Alpheus aculeatus. Sabine, Suppl. to Parry's Voyage, p . 2 37. p i. 2. Jig. 9, 10.
A s i t se em s n ow a g r e e d to re s tr ic t th e g en u s A lp h e u s o f L am a r c k to th o s e sp e c ie s whose second
p a i r o f c law s a r e sh o r te r th a n th e first, I h a v e re fe rred th is a n d th e follow in g s p e c ie s to th e well-founded
g e n u s o f L e a c h a n d D e sm a re s t.
T h e sp e c im e n s a re from th e A rc tic se a s.
24. H i p p o l i t e a rm a t a . n. s.
H ip . thoracis carina quadri-denlatá, margine anlico ti
I, scgmentis spinis binis aut ternis utrinque terminatii.
Long, corp, unc. 3, lin . 3.
I n th is sp e c ie s th e thorax is g r a n u la te , w ith th e in fe rio r a n d p o s te r io r m a rg in c a n a lic u la te ; along
th e m id d le l in e i t b e a rs fo u r e le v a te d s p in e s ; th e a n te r io r m a rg in h a s th r e e sp in e s. T h e ro strum is
i:ii il