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e x te r io r to w h ic h is o n e sm a lle r. O f th e four te e th a t th e s id e s o f th e c a r a p a c e , th e two p o s te r io r a re
m o s t p o in te d , a n d v e ry sm a ll tu b e rc le s m ay b e o b s e rv e d in th e in te rsp a c e s.
T h e ch e la , o r fo rc ep s c law s , a re o f eq u a l s iz e , th e carpus h a s a s tro n g o b tu s e to o th on i t s in n e r
a sp e c t, a n d a s in n o s ity a b o v e ; th e manus is m a rk e d w ith fo u r lo n g itu d in a l a n d s lig h tly p u n c tu a te d
fuiTOws ; th e d ig its a re d e n ta te d , slightly h o o k e d a t tb e po in ts, a n d o f a v e ry d a rk b row n colour, which
c o lo u r a lso e x te n d s a little way a lo n g th e u n d e r p a r t o f th e m am s . T h e c law s a r e m o d e ra te ly lo n g a n d
th i c k , h irsu te a t th e ir m a rg in s a n d ex trem itie s , a n d g r a d u a lly d im in ish in siz e to th e la s t pa ir.
T h e c o lo u r o f th is c ra b is g rey ish w h ite , m o ttle d w ith red d ish b row n o r du ll o ran g e .
T h e lo n g itu d in a l fu rrow s on th e manus a r e om itte d in H e rb s t’s d e s c r ip tio n , b u t th ey a p p e a r in th e
fig u re ; a n d th e t e x t re c ip ro c a lly s u p p lie s a n om issio n w h ich o c c u rs in th e e n g ra v in g , viz . o f tb e h irsu te
c h a r a c te r o f th e c law s .
T h e sp e c im en s , tw o in n um b e r , a r e m a le s , a n d a ll th a t H e rb s t p o sse ssed w e re o f th e sam e s ex .
T h e y w e re ta k e n a t O a h u , S an dw ich I s l e s ; th e n a tiv e n am e is K um im i.
S e c t i o n QXJADRILATERA, L a i r .
G e n u s G E L A S IM U S , L a tr .
2 . G e l a s im u s t e l e s c o p i c u s . n . s .
Cel. oeuhrum pedunculis extra angvlis clt/pei valde porrecfts, laienit« clypei trispinosis, femwibus supra unispinosis.
Long, clypei, Un, 8; lat. lin. 12.
Color, casius.
T h is is a s in g u la r a n d in te r e s tin g D e c a p o d . I t is a llie d to Gonoplax (L e a c h , Malacostr. Podoph-
thalm. B r i ta n n ia , tab. 13.) in th e form o f th e c a ra p a c e , a n d u n isp in o u s c h a r a c te r o f th e fem o r a , b u t th e
p edipalpi a n d antenna a c c o rd w ith th e g e n e ric c h a ra c te r s o f Gelasimus, L a tr . {Nouv. D ie t. d 'H is t.
N a t. 12. p . 517.) I n th e p ro p o rtio n a te le n g th o f its o p h th a lm ic p ed u n c le s , h ow eve r, i t e x c e e d s
a ll o th e r k n ow n C r a b s : th e s e a re s le n d e r, en d ow ed w ith fre e m o tio n , a n d so p ro d u c e d a s to e x te n d
b ey o n d tlie an g le s o f th e s h e ll b y h a lf th e i r len g th .
O f th is sp e c ie s M r . L a y h a d p re s e rv e d tw o sp e c im e n s , a m a le a n d a fem a le , b u t in bo th u n fo rtu n
a te ly th e r ig h t forc eps c law w a s w an tin g . T h is c irc um s ta n c e p re c lu d e s a s a tis fa c to ry id e n tity w ith th e
b e c k o n in g c r a b s ; a n d a t th e s am e tim e w ith such a m u tila tio n th e fo rm a tio n o f a n ew g en u s is sc a rc e ly
w a r r a n ta b le m e re ly o n a c c o u n t o f th e len g th o f th e o p h th a lm ic p e d u n c le s .
T h e p ed ip a lp i a re a p p ro x im a te d , b u t w ith a sp a c e in te rv e n in g a t th e ir b a s e ; in which c ircum s tan c e ,
a n d in th e form o f th e first jo in t o f th e me sia l antenna, w h ich i s e lo n g a te d a n d n o t tr a n sv e rs e , this
sp e c ie s d e v ia te s from th e g en e ric c h a r a c te r o f Macrophthalmus, (L a tre illo , Cui>. R e g n x A n im . 4 . p . 44,
nouv. ed.) T h e s e c o n d a n d th ird jo in ts o f th e pedipalpi a r e la rg e , fla t, a n d u n e q u a lly q u a d r ila te r a l; tb e
fo u r th jo in t is in s e r te d a t th e su p e rio r a n d e x te rn a l a n g le o f th e p re c ed in g . T h e la te r a l antenna a re
s itu a te d a t th e in n e r angle s o f th e in s e rtio n o f th e o ph th a lm ic p e d u n c le s ; th e y a r e fo u r-a rticu la te , with
th e ir la s t jo in t se ta c e o u s . T h e m e s ia l antenna a re sm a lle r, a n d lie b e n e a th th e ro s trum ; th e ir la s t
jo in t is d a rk -c o lo u r e d a u d bifid. T h e c a ra p a c e is tra n sv e rs e ly q u a d r ila te r a l, b ro a d e r in fro n t, sm ooth,
s lig h tly c o n v e x , w ith a n a r row d e p re s s e d rostrum which is g ro o v ed a lo n g th e m id d le , a n d with th re e
sm a ll sp in e s a t th e a n te r io r p a r t o f th e s id e s o f th e sh e ll. T h e ey e -s ta lk s a r e lo d g ed in wid e grooves,
w h ich h a v e finely c r e n a te ed g e s.
T h e le f t chela is sm a ll a n d c om p re s s e d ; th e manus is c a r ín a te a t th e o u te r m a rg in , a s i t lies in th e
p ro n e s t a t e ; th e fin g e rs close w itli a sm a ll c irc u la r in te rv e n in g sp a c e a t th e b a s e ; th ey a re p o in ted , a n d
h ir s u te a t th e e x tr em ity . T h e c law s a re c om p re s s ed , th e fo u rth p a ir b e in g th e lo n g e s t, th e n th e th ird ,
tb e se c o n d a n d th e fifth. T h e f em o r a h av e e a ch a sm a ll sp in e a t th e u p p e r m a rg in , n e a r tb e d ista l
e x tr em ity ; th e l a s t jo in ts a r e ve ry s le n d e r, a n d fine ly p o in te d .
A 'X T V .
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