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84 C R U S T A C E A .
T h e se c o n d a n d th i rd p a ir s o f c law s a r e m a rk e d w ith a lte rn a te tr a n s v e r s e b e lts o f w h ite a n d c a rm
in e , tb e la t t e r b e in g s p r in k le d w ith m in u te w h ite sp o ts , th e l a s t jo in t w h ite w ith r e d s p o t s ; sm a ll
s tiff p in k co lo u red h a ir s a re s c a tte r e d h e r e a n d th e re o v e r th e c l aw s ; th e th ird p a i r has b e sid e s s ev e ra l
p a c k e ts o f m o d e ra te ly lo n g h a ir s o f th e sam e c o lo u r g row in g from th e u n d e r p a r ts o f th e la s t a n d
p e n u ltim a te jo in ts , re s em b lin g a b rn s h .
T h e fo u rth a n d fifth c law s h a v e a ro u g h en ed b row n s u r f a c e on th e o u te r a s p e c t o f th e ir te rm in a l
jo in t s , w h ic h a ids th em in a d h e r in g to th e p illa r o f th e s h e ll s e le c te d for th e ir a b o d e . T h e a b d om e n
h a s fo u r th in h o rn y p la te s a t i t s u p p e r p a r t, a n d as m an y s h o r t a n d s le n d e r c ilia te d a p p e n d a g e s
a t ta c h e d to th e le ft sid e .
P l a t e XXV. F i g . 2 . P a g u r u s p i c t u s .
2 a. P e d ip a lp u s e x te r n u s , a u c tu s .
G enus C A iN O B lT A , L a tr .
1 4 . C jENOBi t a O l i v i e r i .
Ccen. magna, rubra, tuherculata, chela sin h tra majore exirorium muricala, immaculata.
Long. cOTp. u nc. 5,
Pagurus clypeatus. Oliv., Encycl. Meth. Ins. 8. p. 643. sp. 14. p i. 311.
A f te r a c a re fu l com p a riso n o f th e P a g u ru s clypeatus o f O liv ie r w ith th e d e s c rip tio n o f th e Cancer
clypeatus o f H e rb s t, I am o f o p inion th e y a r e d is tin c t sp e c ie s .
H e rb s t ex p re s s ly s ay s, “ D e r S c h ild is t oben g a n z g l a t t T h e sh ie ld is sm o o th ab o v e ; “ D ie
H a n d is t a u f d e r O b e rflä ch e g l a t t ; a u f d e r M itte s te h t e in g ro s s e r h im m e lb la u e r F l e c k ; ” T h e h a n d
( s p e a k in g o f th e le f t chela) is smooth above , a n d m a rk e d w ith a la rg e a z u re sp o t in th e m iddle . I n
n e itiie r o f th e s e re sp e c ts d oe s th e P a g u ru s clypeatus o f Olivie r c o rre sp o n d w ith H e rb s t’s sp e c ie s , h a v in g
b o th th e c a r a p a c e a n d th e u p p e r p a r t o f th e manus o f th e le ft chela m u r ic a te d , a n d th e l a tte r w ith o u t
an y sp o t. M o reo v e r, H e r b s t ’s spe c ie s is v e ry sm a l l ; he h a d n o t se e n a n y th e le n g th o f whose c a ra p
a c e ex c e e d e d h a l f a n in ch , a n d co n s eq u en tly he g a v e a m a g n ifie d view o f th e sp e c ie s ( ta f . 8. fig. 2
a n d th a t i t is a sm a ll spe c ie s is p ro v e d b y one o f M r . L a y ’s sp e c im e n s , w hose c a ra p a c e is n o t q u ite a n
in c h lo n g , h a v in g o v a a tta c h e d to th e c ilia te d ap p en d ag e s o f th e p o s t-ab d om en , and filling th e H e lix ,
its h a b ita tio n , lik e th e o va o f O cy th o e in A rg o n a u ta A rg o . I n co lo u r, a lso , which H e rb s t d e sc rib e s
a s a d irty w h ite , c lo u d e d w ith b row n o r b lu e , th e P a g u ru s clypeatus o f O liv ie r is a lto g e th e r a t v a ria n c e
w ith th e Cancer clypeatus o f th e G e rm an c a rc in o lo g is t: “ II e s t fo rt g ra n d , e t d ’u n ro u g e t r e s - c l a i r ,'
s ay s O liv ie r—a n e x p re s s io n which w o u ld n a tu r a lly flow from th e c o n tem p la tio n o f su c h a specimen
as is b e fo re m e ; a n d a lth o u g h h e ad d s , “ j a u n a t r e ou b ru n e ,” y c l th e u n ite d te s tim o n ie s of M r . L ay
a n d M r . S tu tc h b u ry , who h a v e h a d o p p o rtu n itie s o f o b se rv in g g r e a t n um b e rs o f O liv ie r’s sp e c ie s in its
n a tiv e is la n d s , a r e in fav o u r o f th e b r ig h t re d b e in g th e m o s t p re v a le n t colour.
T h e thorax o f th is species h a s th e ap p e a ran c e o f a ro u g h e n e d tu b c rc n la te su rfa c e winch h a s be en
su b je c t to a ttr itio n ; so tb a t while th e mid d le p ro je c tin g p a rt is smootli, o r im p re ssed with p u n c ta , the
sid e s h a v e re ta in e d th e tu b e rc u la te c h a ra c te r. T lie tru n c a te d an te rio r ma rg in o f th e thorax is c an a li-
eu la te , with th e angle s p ro d u c ed fo rw a rd . T h e e y e -p ed iin c le s a re c om p re s s ed , an d conve rge , fla tten ed
on th e ir in n e r a sp e c t, co n v ex e x te rn a lly , to which a sp e c t th e visual org an is con fin ed , as in d e ed , from
th e c lose a p p ro x im a tio n an d form o f th e su p p o rtin g p edunc le s, i t would b e use le ss o n th e o p p o site side.
T h e sm a ll sc a le , which in th e P a g u r i u su a lly is s itu a te d on tiie d orsa l a sp e c t o f th e b a se o f th e p edunc le s,
is lie re s itu a te d be tw e en them . Bo th p a r ts a r e m a rk e d with small w hite g ran u le s . T h e la te ra l antenna
a re sh o rte r th a n th e chela-, th e me sia l a re a lm o st a s lo n g as th e s e ; with th e ir first jo in t co nic a l, and
b e a rin g a f la tte n e d proc e ss a t th e u p p e r p a r t n e a r tlie b a s e ; th e su p e rio r o f th e te rm in a l se ta is d o uble
th e le n g th o f th e infe rior.
T h e e x te rn a l fo o t-p a lp e lias a ll its jo in t s u n a rm e d , c om p re s s e d la te r a lly , h ir s u te ; th e se co n d a n d
fo u rth a r e lo n g e s t, as in th e P a g u r i ; ih e J îa g rum e x te n d s ve ry little b e y o n d th e s e c o n d j o in t o f th e
fo o t-p a lp e ; i t s se c o n d jo in t is sq u am m ifo rm .
T h e le f t chela is la rg e s t ; a ll th e jo in t s b u t th e la s t a r e tlire e -s id ed , sm o o th b e low a n d o n th e
in n e r s id e , In b e r c u la te e x t c r n a l l j ; th e ulna o f th e rig h t elieh ha s a n o tc h a t i t s u p p e r m a rg in . T h e
fin g e rs o t h o th c U a a r e o b tu s e a t th e e x tr em itie s , a n d have tu b e r c u la te te e th e x te rn a lly . T h e
manus in b o th Is lu b e ro u la to e x te rn a lly , a n d h a s a tu f t o f s h o r t h a irs a t th e u p p e r a n d in n e r p a r t ,
n e a r th e b a s e ; th a t o t th e le ft chela is more p ro d u c e d in fe rio rly , a n d h a s a r id g e a lo n g th e in n e r a sp e c t.
T h e th ird p a ir o f c law s is lo n g e r th a n th e s e cond ; h o th a r e u n iv e r s a lly tu b e r c u la te ; th e tu b e r c le s
sm a ll, o f a w h itish c o lo u r, w itli a b la c k ap e x ; a r r a n g e d in a s e r r a te d fo rm a lo n g th e u p p e r m a rg in o f
th o p ro x im a l j o in ts ; th o s e a re o f a ro u n d e d form, a n d a re te rm in a te d hy sh o rt o b tu s e c law s . T h e la s t
jo in ts o t th e fo u r th a n d fifth d im in u tiv e c law s h a v e th e ro u g h e n e d b row n s u rfa c e e x te rn a lly . T h e
post-abdamen is s h o r te r th a n th e th o r a x -, its c o n c a v ity h a s a f e lle d a p p e a r a n c e from sh o rt d ow n y
h a ir s ; th e re a r e n o la te r a l a p p e n d a g e s in th e sp e c im en ; th e te rm in a l o n e s a r e a s in th e P a g u r t, with
th e e x te r io r ro u g h e n e d su rfa c e ou b o th th e sm a ll c la sp e rs .
T h e sp e c im en w a s c a p tu r e d a t O a h u , S an dw ich Is le s , a n d is s a id by M r. L a y to a b o u n d in th e
L ow I s la n d s o f th e P a c if ic , w h e re i t is a n a r tic le o f food. T h e n a tiv e s ro a s t th em , a f te r p u llin g off
th e ir c law s , wh ich a re s c a tte r e d a b o u t. T h e s e f r a gm e n ts soon a t t r a c t o th e r s o f th e sp e c ie s , w h ich
com e to fe ed on th e r em a in s o f th e ir s la u g h te r e d c om p a n io n s , so th a t a f te r th e m e a l h a s c om m e n c e d ,
an am p le s u p p ly is th u s k e p t u p . r y, • i u-.
M r. S tu tc h b u ry h a s in fo rm ed m e th a t tb e y com m o n ly s e le c t Turbo setosus, L am . fo r th e i r h a b ita tio
n , a n d th a t he h a s m e t w ith th em d r a g g in g a b o u t th is v e ry h e avy sh e ll e ig h t h u n d r e d f e e t above
th e le v e l o f th e s e a , in th e I s la n d o f T a h iti.
15. C æ n o b i t a c l y p e a t a . L air., Fam. Nat. p . 277. Règne Anim. 4. p. 77.
Pagurus clypeatus. Fahr., S u p p l p . 413.
Cancer clypeatus. Herhst, 2. p . 22. taf. 23. Jig. 2. a, b.
Cam. p a fv a , albido-ceesia. thorace su b la v i, chela einistrâ majore extrormm leBvi maculâ brunneâ, supra lineâ tuberculatâ
soUtariâ.
Long, corp, une. 2 .
I n th is species th e thorax is sm ooth, b u t in form re sem ble s th e fo rm e r sp e c ie s , e x c e p t th a t th e
p o s te rio r n o tc h is p ro p o rtio n a lly d e e p e r. T h e e x te rn a l an ten n a a re also lo n g e r, e x te n d in g a little
w ay b eyond th e g r e a te r chela. T h e in te rn a l antenna, th e pedipalpi, a n d Hie o p h th a lm ic p ed u n c le s ,
corre spond w ith th o s e o f Ccen. OKvieri; a n d th e chelcx a lso , ex c e p tin g th e manus o f th e le ft, w bm h i s m ore
c o n v ex e x te rn a lly , sm o o th , m a rk e d witli a d e e p b row n o r blue s p o t, a n d h a s n e a r th e su p e r io r m a rg in
a s in g le row o f sm a ll tu b e rc le s . T h e se conil a n d th ird p a irs o f c law s d iffer from th o s e o f th e p r e c e d in g
sp e c ie s in h a v in g th e u ltim a te jo in ts o f a tr ih e d r a l in s te a d o f a ro u n d e d fo rm . A t th e s u p e r io r p a r t o f
th e ab d om en a re fo u r n a r row tr a n s v e r s e c ru s ta c e o u s p o rtio n s , to th e le f t s id e o f th e th r e e s u p e r io r o
w h ich a re a r tic u la te d a s m an y ap p e n d a g e s , c o n s is tin g o f a s h o r t stem te rm in a te d b y tw o c ilia te d
p ro c e s s e s , o n e m u c h lo n g e r th a n th e o th e r. , m . t ,•
T h e sp e c im en s w e re c a p tu r e d a t L oo-C hoo, in tb e s e a o f J a p a n . H e rb s t gives th e E a s t In d ie s
a s th e n a tiv e pla c e o f his spe c ie s.
P l a t e XXV. F i g . 3 . C æ n o b i t a c l y p e a t a .
3 a . P e d ip a lp u s e x te rn u s , a u c tu s .
3 b. Che la s in is tra .
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