101 



The colour is light brown fading on the head and belly : the fins are 

 grey. 



The size is much smaller : a gravid female in the Museum collection is only 

 4- inches long. 



Andaman Sea, 490 fathoms. 



Regd. No. 11768. 



Distribution : off Atlantic coast of Brazil, 350 fathoms : Andaman Sea, 490 

 fathoms. 



79. Diplacanthopoma raniceps, Alcock. 



Dipiacanthopoma raniceps, Alcock, Ann. Mag. Nat. Hist., Aug. 1898, p. 154: Illustrations of the Zoologt 

 of the Investigator, Fishes, pl. XXVI. fig. 2, 2a. 



Differs from D. Rivers- Andersoni only in the following particulars : — 



The head is conical, the slope from the occiput to the tip of the snout being 

 gentle and not abrupt, the whole head being frog-like. 



The length of the snout is equal to the diameter of the eye, which is nearly 

 a fourth the length of the head. 



The spines of the operculum hardly project through the skin. 



The ventrals arise nearer the clavicular symphysis : each consists of a stout 

 filament, more than half as long as the head, and flattened and broadened 

 in the middle of its course : each is made up of at least two intimately-fused 

 rays. 



The size is much smaller, a gravid female in the collection is not quite six 

 inches Ions;. 



Colours in spirit as in D. Bivers-Andersoni. 



Andaman Sea, 405 fathoms. 



ry i AT 117 118 139 



Regd. JNos. — , — , — . 



The male is furnished with a most elaborate copulatory organ, which is 

 almost as long as the snout. It is hollow and is lined and strengthened by the 

 peritoneum, which is as thick and tough as leather. The intestine opens at its 

 base, and the testes are prolonged into its cavity. Its free end has almost the 

 consistence of cartilage and is thrown into several broad rigid lip-like folds 

 which inclose two deep cavities. From the smaller (anterior) cavity a pair of 

 papilla? project, and into the larger (posterior) cavity the testes open. 



The corresponding organ of the female, though smaller than that of the 

 male, is large. It is a hollow cone, lined by peritoneum, and lodging the ends 

 of the ovaries, which open by a large common orifice at its spongy tip. 



