358 STALK-EYED CRUSTACEA 



I. Coenobita. 



Coenobita . . Henderson, Hilgendorf, Latreille. 

 Cenobita . . H. Milne Edwards, De Haan, Dana, 

 Stimpson, Haswell. 



Carapace elongated ; the rostrum but slightly marked. 

 Ocular peduncles compressed. The first pair of legs of 

 unequal size, the left the largest. Abdomen soft and 

 membranous, twisted on itself. Firs't five abdominal 

 segments with narrow tergal plates, the sixth with a well- 

 developed pair of appendages (of which the left is larger), 

 followed by a well-marked telson. 



Range. — West Indies, Admiralty Islands, East Coast 

 of Africa, Islands of the Pacific. 



I. Coenobita diogenes. 



Ccenobita diogenes . . H. Milne Edwards, Catesby. 

 Pagurus diogenes . . . Latreille. 



The gastric region is scarcely convex. Ocular 

 peduncles as long as the anterior border of the 

 carapace, rounded on their superior border, and ter- 

 minating in hemispherical cornea ; their basal scale of 

 moderate size, oval. A sharp and very prominent ridge 

 upon the inferior border of the two last joints of the 

 third left leg. 



In the Barbados species the left hand is disc-shaped ; 

 with it the animal closes the shell in which it lives. The 

 colour is a light brick-red with patches of purple on the 

 carapace, centre of eye-peduncles, centre of each joint of 

 three first pairs of legs, except the terminal joint of walk- 

 ing legs. The left hand and fingers are almost all purple. 

 These patches of purple have a margin of brick-red round 



