XANTHO. 35 



Xantho mvulosa, Bisso, sp. Brno's Crab. — Fingers 

 grooved, brown, the bosses on the carapace more depressed 

 than in the preceding. Eour last pairs of legs furnished 

 with hairs along their upper margin. Carapace yellowish, 

 spotted with red. 



Common on the coast of Cornwall, under stones about 

 low-water mark, where it was first ascertained to be British 

 by Mr. Couch. 



Xantho tuberculata, Bell. — The carapace slightly de- 

 pressed in front ; hands and wrists tuberculated, rugose ; 

 fingers nearly black, the movable one with three grooves ; 

 third joint of the four last pairs of legs minutely toothed 

 on the upper edge, the three terminal joints covered entirely 

 with hair. 



Found by Mr. Couch in Mount's Bay, whence he first 

 sent it to Professor Bell, who described and figured it in 

 his classical work. 



Gen. 9. CANCER, L. 



Sides of carapace in front with many teeth or lobes placed 

 close together. Movable stem of outer antennas springing 

 from under the front, and completely out of the orbit, from 

 which it is separated by a prolongation of the basilar joint 



