( 116 ) 



Except for a few long setae on the fingers and edges of the palm, the 

 chelipeds are quite glabrous : they are of about the same length and are of 

 slender make, but the right is stouter than the left, especially in the male, in 

 which sex they are more than thrice as long as the carapace. The carpus 

 is about as long as the merus and longer than the palm, and its upper surface 

 is closely and very finely granulous. The palm is longer than broad (very 

 much longer in the case of the left hand) and longer than the fingers in the 

 right hand and about the same length as the fingers in the left. 



The 2nd and 3rd legs slightly surpass the chelipeds. Except for a few 

 setse and for one or two spinules at the far end of the anterior border of the 

 merus, they are smooth and glabrous. The propodus and dactylus are 

 flattened, elongate, and of about equal length, the dactylus being broader 

 than the propodus, extremely thin, and shaped like the blade of an Indian 

 sword. 



The right vas deferens is recurved upwards over the right flank and then 

 over the dorsum of the abdomen as far as the base of the left leg. 



Length of carapace of m.ale about 4'5 millim., a female with eggs 

 is smaller. 



The animal inhabits light broad-mouthed shells which in some cases are 

 covered by a single sea-anemone. 



4746 



. Maldive Islands, J. Stanley Gardiner. 



10 ' 



Henderson's specimens came from the Gulf of Martaban. 



Cestopagurus, Bouvier. 

 Cestopagurus, Bouvier, Bull. Mus. d'Hist. Nat. Paris, 1897, p. 229. 

 Differs from Catapa^urus in the following particulars : — 



The rostrum is more prominent : the eyestalks are long and not remark- 

 ably stout, and the eyes are of moderate size. The long, curved, tubular vas 

 deferens passes from the coxa of the 5th right leg, across the ventral surface 

 of the abdomen, and then ascends over the left flank. 



This genus is known, so far, only from the G. of Aden and the Maldives. 



1. Cestopagurus olfaciens, n. sp. 



Rostrum fairly prominent. Eyestalks longer than the front border of the 

 carapace, and than the antennal peduncles, but much shorter than the 

 antennular peduncles. The antennular peduncles are particularly long and 

 stout, their terminal joint is club-shaped, and their upper flagellum is divided 



