BRACHYURI. 193 



PL.1TE XLV. 



Fig. 6. Mass of roe. 



7. Cluster of capsules or ova, enlarged. 



8. Detached capsules or ova, enlarged. 



§ (2.) Cancer (forcellana) platycheles. — Rough-footed Crab. 



Shell nearly circular, about three quarters of an inch in diameter, 

 somewhat convex. Claws large and strong. These, together with the 

 margin of the shell, are thickly beset with bristles. The external an- 

 tennae are very long ; the internal proportionally short. Colour uni- 

 versally reddish-brown. 



None of several specimens have ever fed, though offered various 

 substances. They seem to be very pacific, and are evidently extremely 

 delicate, the shghtest impurity of their element uniformly proving fatal. 

 Nevertheless, under suitable treatment, several specimens have survived 

 some mouths in confinement. 



Plate XLV. 



Fig. 9. Cancer (porcellana) platycheles. 



C. — Cancer (cortstes) CASsrvELAUNus. — Plate XLVI. figs. 1, 2. 



The body of the preceding animal is of a circular form, the limbs 

 short and stout, and the antennas very long. The antennae of the pre- 

 sent subject are also very long, straight, pointed, and fringed along the 

 interior. The body, or carapace, extends in a long oval about an inch 

 and a half in breadth, with five spines on each side of the shell. The 

 feet originate from the narrow portion of the shell, the claws are long 

 and slender, and the tail curves over the posterior part. 



This creature dwells in deep water, but it is very rarely seen in any 

 of the districts that I have frequented. 



In drying, the redness of the shell is converted to cream colour. 



Plate XLVI. 



Fig. 1 . Cancer (corystes) Cassivelamms, back. 

 2. Same, breast. 



2b 



