228 



250 fathoms, and from the Arabian Sea, off the Travancore coast, 224-284 

 fathoms. 



Eegd. Nos. f? : S & SS- (Typ es of the species) : : ^ : . 



CHL^NOPAGUBUS, Alcock. 



Chlsenopagnrus, Alcock, Journ. Asiatic Soc. Bengal, Vol. LXVIII. pt. 2, 1899, p. 113. 



Carapace quite membranous, except the gastric and cardiac regions, which 

 are well calcified. Rostrum prominent. 



The abdomen, except for the first two terga which are more or less calcified 

 and for the last tergum and telson which are properly calcified, is a soft bag, 

 flexed on itself but not spirally coiled, perfectly symmetrical in the male, but 

 unsymmetrical in the female by reason of the presence on one side only of an 

 enormous fleshy lobe that forms a brood-pouch. The tacked in telson and the 

 hook-like caudal swimmerets are quite symmetrical, the inner swimmeret being 

 extremely small. 



The ophthalmic scales, which are spiniform, are separated by a considerable 

 interval. The eyestalks, which are of moderate length, are stout : the eyes are 

 large and reniform. 



The antennular peduncles are of moderate length, as is the upper flagellum, 

 which is much longer and stouter than the lower. 



The antennal acicle is long : the flagellum is of fair length. 



The mandibles, which carry a largish incurved three- join ted palp, have the 

 incisor process separated from the molar process by a deep groove. 



The other mouth-parts differ from those of Parapagurus only in the follow- 

 ing points : the coxopodite of the 1st maxillaB is not recedent, the scapho- 

 gnathite is posteriorly truncated, the epipodite of the 1st maxillipeds is small and 

 is not posteriorly produced, the foliaceously-falciform exopodite of the 1st maxil- 

 lipeds ends in a flagellum. As in Parapagurus, the external maxillipeds are 

 separated from one another at base. 



The chelipeds are equal : they are massive in both sexes, but more so in the 

 male. 



The legs of the 2nd and 3rd pairs are long and stout, particularly as to the 

 dactyli. Those of the 4th pair, though reduced in length, are longer than in 

 most hermit-crabs and end in particularly perfect chela3. Those of the 5th pair 

 are short and minutely, though perfectly, chelate. 



In the male the first two pairs of abdominal appendages are present and are 

 quite symmetrical : they are uniramous appendages modified for purposes of 

 reproduction. The appendages of the next three somites (3rd-5th) are present 

 on one side only right or left : they are minute, or rudimentary, and uniramous. 



