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s le n d e r , e x te n d s to th e ro o t o f tlie seta o f th e m e sia l antenna, h a s two te e th above , b e h in d th e m id d le
a s m a n y b en e a th , b e fo re th e m id d le ; b u t th e c iiie f c lia ra c te ris tic o f th is s p e c ie s , a n d th a t which
d is tin g u ish e s i t from th e p re c e d in g , which in o th e r re sp e c ts i t c lo se ly re s em b le s , is , th a t th e se co n d ,
th ird a n d fo u rth ab d om in a l s e gm e n ts te rm in a te below in th re e sp in e s , a n d th e firs t a n d fifth in two
sp in e s , w h ils t th e la s t o n ly is te rm in a te d b y a s in g le sp in e , d ir e c te d b a c kw a rd s . T h e first j o in t o f th e
su p e r io r o r m e s ia l antenna h a s a lo n g sp in e e x te rn a lly a t th e b a s e , a n d a s h o r t sp in e a t th e sam e
a sp e c t of Die a p e x ; th e se cond jo in t ha s also a sp in e e x te rn a lly a t th e a p e x , a n d th e th ird h a s a sp in e
a t th e a p e x , b u t o n tlie u p p e r p a r t. 'The in te rn a l seta e x te n d s ve ry l ittle b ey o n d th e squama o f Uie
la te ra l antenna. T h e p ed u n c le o f th e s c a le o f th e s u p e r io r o r la te r a l antenna h a s tw o s p in e s e x te rn a lly .
T h e te rm in a l seta is a s lo n g a s th e b ody, a n d sp in o u s e x te rn a lly th ro u g h o u t its whole le n g th . T h e
fem o ra o f th e th ird , fo u rth a n d fifth p a irs o f legs a re sp in o u s e x te rn a lly , th e te rm in a l sp in e b e in g th e
lo n g e s t. T h e la s t jo in t o f th e fo o t-p a lp e is h ir s u te , a n d sp in o u s a t th e ex trem ity . T h e m iddle lamella
o f th e ta il h a s tw o row s o f e ig h t sp in e s e a ch a lo n g th e s u p e r io r a sp e c t.
T his sp e c ie s is a b u n d a n t o n th e sh o re s o f K am ts c h a tk a .
P L A T E X X V II. F ig . 2. H i p p o l i t e a rm a t a .
25. H i p p o l i t e c o r n u t a . n. s.
H ip . thoracis cnrind dentibus quatuor, margine antico triapinoso, setis antennarum auperiorum elongatis.
Tiiis species p re sen ts tlie s in g u la r ity o f th e in te rn a l s e ta o f th e su p e r io r antenna, b e in g p ro d u c e d
to n e a rly a n eq u a l le n g th with th e in f e r io r antenna, b u t in ev e ry o th e r r e s p e c t a d h e r e s c lo se ly to th e
g e n e ric ty p e ; an d I am th e le ss in c lin e d to c o n s id e r it a s o th e r th a n a specific d iffe renc e , from o b s e rv in g
th a t th e in d iv id u a ls o f th e g en u s Crangon d iffe r c o n s id e ra b ly in th e length o f th e i r antenna, tho e x te r io r
o f which in o u r com m o n spe c ie s, a n d some o th e rs , su rp a s s th e len g th o f th e b o d y ; w h ils t in Bo r ea s
a u d L a r th e y b a r e ly re a ch b eyond tlic th o r a x .
In this spe c ie s o f H ip p o lite , th e s e la o f th e e x te rn a l antenna a re a lte rn a te ly a n n u la te d w ith re d
a n d w h ite ," as in P an d u lu s annulicornis, Leach, a n d a re spitiulose a lo n g th e th e in n e r a sp e c t. T h e
a b d om in a l s egm en ts te rm in a te in fe rio rly in two s p in e s , o f whicli th e p o s te rio r is th e lo n g e s t; in eve ry
o th e r re sp e c t th e d e s c r ip tio n o f th e p re c e d in g spe c ie s w ill a p p ly to this.
P la t e X X V III. F ig . 2. H i p p o l i t e c o r n u t a .
26. H i p p o l i t e p a l p a t o r . ». s.
H ip . rostra brevi lenui, thoracis margine anlico hispinoso, p edipalpis prcslongia.
Long. corp. 1 a»c. 10 lin. Color ruber.
T h is sp e c ie s m a y be e a s ily re co g n is ed by th e len g th o f th e f e c t-p a lp e s , which e x te n d fo rw a rd
b eyond th e se co n d p a ir o f leg s . T h e se c o n d jo in t is sp in o u s e x te rn a lly , a n d re a c h e s to th e ro o t o f th e
seta o f th e e x te rn a l a ntenna; th e la s t jo in t is siib h irsu te a n d sp in u lo s e a t th e e x tr em ity . T h e rostrum
in th e single sp e c im en I h a v e e x am in e d h a d tw o sp in e s ab o v e , a n d one b e n e a th , n e a r th e a p e x ; it
ex te n d e d to th e p e n u ltim a te jo in t o f th e m e sia l antenna. B eh in d th e rostrum a r e fo u r sp in e s a lo n g
th e an te rio r h a lf o f th e thorax, a n d th e r e a r e tw o spines a t th e a n te r io r m a rg in , b o th b e low th e ey e ;
th e r e s t o f th e thorax is sm ooth. 'I ’h e m e sia l an ten n a d o n o t e x te n d h ey o u d th e squama o f th e
la te ra l antenna. T h e s e a re lo n g e r th a n th e bod y . T h e ab d om in a l s e gm e n ts a r e c ilia te in fe rio rly ,
b u t u n a rm ed , sav e a sm a ll spine o n e ith e r s id e th e la s t segm en t. L am e lla o f th e ta il sh o rt a n d
b ro ad , th e m id d le one with tw o row s o f fo n r s p in e s e a c h a lo n g th e su p e rio r a sp e c t.
I t is a n a tiv e o f Mo n te rey , C a lifo rn ia .
P la t e X X V III. F ig . 3. F Ii p p o l i t e p a l p a t o r .
• I suspect th is is also th e c n th e preceding species, b u t the colour is too far gone to speak with c ertainty.
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