VI ANOMURA PAGURIDEA 171 



Fam. 1. Albuneidae. — The first legs are subchelate ; the 

 carapace is flattened, without expansions covering the legs. 

 Albtinea with several species in the Mediterranean, West Indies, 

 and Indo-Pacific. 



Fam. 2. Hippidae. — The first legs are simple, the cai'apace is 



Fig. 117. — Remipes scufellatws, dorsal and ventral views, x 1. (From original 

 drawings prepared for Professor Weldon.) 



subcylindrical with expansions covering the legs. Remipes (Fig. 

 11 7) and Hippo, in tropical or subtropical seas. 



Tribe 3. Paguridea.^ 



The ordinary Hermit-crabs, common on the English as on 

 every coast, are characterised by the fleshy asyndmetrical 

 abdomen from, which all the hard matter has disappeared, and 

 which is carried tucked away in an empty Gasteropod shell. The 

 abdomen is spirally wound in accordance with the shape of the 

 shell, and a firm attachment is effected by means of the sixth pair 

 of pleopods, especially tha.t of the left side, which is fashioned into 

 the form of a hook and is curled round the columella of the shell ; 

 this attachment is so secure that in trying to pull a Hermit-crab 

 out of its shell the body is torn apart before the hold gives 

 way. The other pleopods are in a much reduced condition, being 

 generally altogether absent from the right side of the abdomen, 



1 Milne Edwards and Bouvier, Bull. Soc. Philomath. Paris (8), ii., 1889 ; and 

 PJxp&lition du Talisman, "Crustaces Dfcapodes," 1900. 



