38 Messrs. E. \Y. L. Holt and L. W. Byrne on the 



All the hauls above mentioned were made on the 21st 

 November, 1898. Station 4 was in 52° 27-6' N., 15° 40' W., 

 and Stations in 52°18-1' N., 15° 53-9' W., and both stations 

 were thus Avithin the British Area as defined by Canon 

 Norman. 



Aiujyropelecus hemiyiimnvs. 



Argyropelecus hemigymnus, Cocco. 



Probably the most interesting specimen captured by the 

 * Oceana ' is a larva of this species 6 75 mm. in length without 

 the middle caudal rays (which are about "5 mm. long) and 

 2*75 mm. from the snout to the anus. A marginal larval 

 fin still persists, but the rays of the unpaired fins of the adult 

 are already well developed ; the marked separation between 

 the abdominal and caudal regions, which is characteristic of 

 older specimens, is, even at this age, very noticeable, but the 

 caudal region is proportionately much longer than in the 

 adult. 



There are signs of developing photophores on the abdomen 

 in positions which correspond roughly to those occupied by 

 the photophores of the adult, a single large photophore near 

 the middle of the base of the anal fin, and another near the 

 ventral margin of the caudal peduncle. The pectoral fins 

 are well developed and nearly as long as the abdominal portion 

 of the body. There is no sign of any ventral fin. 



The net in which this specimen was captured fished from 

 1510 fathoms to the surface, and it is impossible to draw any 

 conclusions as to the vertical range of the species. The 

 locality in which the ' Oceana ' larva was taken is well 

 within the known horizontal range of the species, which has 

 been taken in the Mediterranean and on both sides of the 

 North Atlantic, as far north in the Eastern Atlantic as the 



