842 



PROCEEDINGS OF THE NATIONAL MUSFAWT. 



vol.. XXVI. 



13. OTAKIA Jordan and Snyder. 

 O^aAvVf JoRPAN and Snydek, Proc. U. S. Nat. Mils., 1900, p. 3-45 ( r((.s7;or/??a). 



Body elongate; head elongate, eye large, anterior; mouth very 

 oblique, lower jaw included, the maxillary protractile, and not reach- 

 ing eye; no barbels; teeth 5, 2 — 2, 5, slender, hooked, and with a 

 scarcely discernable grinding surface in two rows. Gill-rakers on 

 first arch slender, pointed; pseudol)ranchi;e present. Air-bladder 

 large, with a median constriction. Alimentar}' Canal .short. Perito- 

 neum silvery. Dorsal inserted a little in advance of ventrals, of 8 

 developed ra3's, the anterior rays weak, and the edge of the fin con- 

 cave; anal of similar shape, with T rays; caudal deeply notched, the 

 tips pointed. Lateral line straight after the first 4 or 5 scales, where 

 it is slightly decurved, and then continuous. 



Color, light, with a silvery, lateral band. 



Species of small size. 



(Named for Keinosuke Otaki, a former student of the senior author; 

 now professoi- in the Imperial Military Academy at Tokyo.) 



19. OTAKIA RASBORINA Jordan and Snyder. 



Otakia rdshorina Jokdax and Snyder, Proc. V. S. Nat. Mns., 1900, p. 345, pi. i.v, 

 fig. 3; Lake Biwa. 



Head -t; depth 4f ; D. 8; A. 7; scales 40 in a lateral series, 10 in a 

 transverse series above ventral, and 17 between in,sertion of dorsal 

 and ()C('ii)ut; eye 4 in head; snout 3i; interorbital space 8^; height of 

 D. 5i in 1)ody; anal 7^; caudal 3|; pectoral H; ventral 0|. 



Fig. ().— Otakia rasborina. 



Body elongate, its depth al)out twice that of caudal peduncle. Head 

 elongate; eye large, nearer tip of snout than posterior edge of opercle, 

 a di.stance equal to half its diameter; mouth very oblique, the lower 

 jaw included, the maxillary protractile, and not extending posteriorly 

 to the edge of the orl)it; no barbels, teeth slender, hooked and with a 

 scarcely discernible grinding surface in two rows. Gill-rakers on first 

 arch slender, long, pointed, and about 10 in number; p.seudo])ranchiie 

 present. Air-bladder large, with a median constriction. Alimentary 

 canal short. Peritoneum silvery. 



Scales large. 



