( 1!^ ) 



Colours in spirit pinkish-yellow, the gastric region iridescent. 



The animal inhabits the tube of sunken twigs of drift bamboo, closing the 

 orifice with its stopper-like chelae. 



— — — Bay of Bengal, off Arakan coast, 419 fath. " Investigator." 



Parapylocheles, Alcock. 



Parapylocheles, Alcock, Investigator Macrura and Anomala, 1901, p. 213. 



Differs from Pylocheles in the following characters only : — 



A little rostrum projects between the bases of the eyestalks, and the 

 lineae anomuricae are distinct, though they do not reach the posterior border 

 of the carapace. 



Though the abdomen is faultlessly symmetrical, and though all the 

 abdominal terga are well defined and in close contact, yet there are no 

 pleura, and on the ventral surface of the abdomen (except for the presence of 

 appendages) there is no visible segmentation : moreover, some of the terga are 

 somewhat ill-calcified. The telson is not divided by a transverse suture, 

 and is not so long as the caudal swimmerets. 



The ophthalmic scales are in contact and the eyes are small and pale. 



The external maxillipeds are not chelate, though they are in close 

 contact with one another at base. 



The thoracic legs of the ist pair, though symmetrical and equal and 

 more massive than any of the other legs, have a carpus of ordinary form and 

 a subcylindrical hand not modified to form a stopper. 



In the female the abdominal appendages of the ist pair are slender and 

 uniramous, and those of the 2nd-5th pairs are slender and biramous with 

 one ramus rudimentary : in the male all, from the ist to the 5th are 

 uniramous, and only those of the and pair are of any size. 



The branchial formula is exactly the same as that of Pylocheles, but 

 the arthrobranchiae of somite IX (external maxillipeds) are mere non-plumose 

 fleshy lobes ; there are thus only 12 functional branchiae on either side, namely, 

 4 pairs of arthrobranchiae (on somites X — XIII), and 4 pleurobranchise 

 (on somites XI— XIV). 



From Mixtopagurus it differs in having the abdomen softer and the 

 ophthalmic scales in contact, the eyestalks tapering, and the eyes pale and 

 small. Also in havmg only 12 functional branchiae on either side. 



