512 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



the scales of the median rostral ridge are in rows radiating- from 

 near front of scale; the lower half of the nasal fossa is scaled. 

 Second dorsal, proximal part of first dorsal, and pectorals light. 



Traces of vertical bars can be seen on the small specimen from 

 station 5587. 



Table of measurements of paratypes in hundredths of length to anus. 



Albatross station 



Total length in mm 



Length to anus in mm 



Length of head 



Length of orbit 



Postorbital length of head 



Width of interorbital 



Width of suborbital 



Orbit to preopercle 



Length of snout 



Length of upper jaw 



Depth of body 



Width of body 



Anus to ventral 



Ventral to isthmus 



Length of first dorsal base 



Length of interdorsal space.. . 



Length of pectoral 



Length of outer ventral ray . . 

 Length of second ventral ray. 



5111 

 1 150 

 66 

 82 

 18 

 23 



i 14 

 8 

 24 



"• 41 

 18 

 29 

 25 

 17 

 18 

 11 

 16 

 25 

 26 



1 Pseudocaudal developed. 



(?nacrorhynchus, in reference to the long snout.) 



41. COELORHYNCHUS ACUTIROSTRIS Smith and Radcliffe. 



Coelorhynclius acutirostris Smith and Radcliffe, Proc. U. S. Nat. Mus., 

 vol. 43, 1912, p. 134, pi. 30, fig. 2, text figure 10. 



This small species is one of the most distinct in the genus; its 

 position in the subgenera into which we have divided C ' oelorhynchus 

 is quite uncertain. The divergence of the spinous carinae on the 

 scales, together with other characters shared in common with the 

 species having that type of squamation, have influenced us to place 

 it in the subgenus Oxymacrurus. In the quincunx arrangement of 

 the spinules on the scales of the head and the bluntness of the sub- 

 opercular flap the species bears some resemblance to those of the 

 subgenus Quincuncia. Its close resemblance to C. (Paramacrurus) 

 gladius of the Hawaiian fauna may indicate a close relationship 

 with that species, as Radcliffe has already pointed out. It resembles 

 C. gladius in the excessively long, pointed snout; in the two ventral 

 fossae, one before the anus, the other before the ventral fins, and in 

 the squamation of the head. In addition to the details enumerated 

 by Radcliffe, C. acutirostris differs from C. gladius in having the 

 spinules on the scales of the head arranged in quincunx order; the 

 spinous carinae of the body scales decidedly divergent instead of 

 parallel ; in the lower first dorsal fin ; and further in certain details 

 of proportions, as indicated in the tables of measurements, and in 

 certain other details mentioned in the following description of this 

 species. 



