CRUSTACEA. 
85 
The external foot-palpe has all its joints unarmed, compressed laterally, hirsute; the second and 
fourth are longest, as in the Paguri; the Jlagrum extends very little beyond the second joint of the 
foot-palpe ; its second joint is squammiform. 
The left chela is largest ; all the joints but the last are three-sided, smooth below and on the 
inner side, tuberculate externally; the ulna of the right chela has a notch at its upper margin. The 
fingers of both chelcc are obtuse at the extremities, and have tuberculate teeth externally. The 
manus in both is tuberculate externally, and has a tuft of short hairs at the upper and inner part, 
near the base ; that of the left chela is more produced interiorly, and has a ridge along the inner aspect. 
The third pair of claws is longer than the second; both are universally tuberculate ; the tubercles 
small, of a whitish colour, with a black apex ; arranged in a serrated form along the upper margin of 
the proximal joints; these are of a rounded form, and are terminated by short obtuse claws. The last 
joints of the fourth and fifth diminutive claws have the roughened brown surface externally. The 
post-abdomen is shorter than the thorax; its concavity has a felted appearance from short downy 
hairs; there are no lateral appendages in the specimen ; the terminal ones are as in the Paguri, with 
the exterior roughened surface on both the small claspers. 
The specimen was captured at Oahu, Sandwich Isles, and is said by Mr. Lay to abound in the 
Low Islands of the Pacific, where it is an article of food. The natives roast them, after pulling oil 
their claws, which are scattered about. These fragments soon attract others of the species, which 
come to feed on the remains of their slaughtered companions, so that after the meal has commenced, 
an ample supply is thus kept up. 
Mr. Stutchbury has informed me that they commonly select Turbo setosus, Lam. for their habita- 
tion, and that he has met with them dragging about this very heavy shell eight hundred feet above 
the level of the sea, in the Island of Tahiti. 
15. C/ENOBITA CLYPEATA. Lair., Tam. Nat. p. 277. Rtgne Anim. 4. p. 77. 
Pagurus clypeatus. Fabr., Suppl. p. 413. 
Cancer clypeatus, llerbst, 2. p. 22. taf. 23. Jig. 2. a, b. 
Can, parva, albido-casia, thorace sublcevi, chela sinistrd majore extrorsum Icevi maculd brunnea, supra lined tuberculatd 
solitaria. 
Long. corp. unc. 2. 
In this species the thorax is smooth, but in form resembles the former species, except that the 
posterior notch is proportionally deeper. The external antenna are also longer, extending a little 
way beyond the greater chela. The internal antenna, the pedipalpi, and the ophthalmic peduncles, 
correspond with those of Can. Olivieri ; and the chela also, excepting the manus of the left, which is more 
convex externally, smooth, marked with a deep brown or blue spot, and has near the superior margin 
a single row of small tubercles. The second and third pairs of claws differ from those of the preceding 
species in having the ultimate joints of a trihedral instead of a rounded form. At the superior part of 
the abdomen are four narrow transverse crustaceous portions, to the left side of the three superior of 
which arc articulated as many appendages, consisting of a short stem terminated by two ciliated 
processes, one much longer than the other. 
The specimens were captured at Loo-Choo, in the sea of Japan. JHerbst gives the East Indies 
as the native place of his species. 
Plate XXV. Fig. 3. CjEnobita clypeata. 
3 a. Pcdipalpus externus, auctus. 
3 b. Chela sinistra. 
