N0.1213. A LIST OF JAPANESE FTSUES— JORDAN AND SNYDEli. 345 



OTAKIA Jordan and Snyder, new genus. 



Tyj)/'. — Otakia rasborina new specie.s. 



Diagnosis. — Body elong-jite; its depth about two times that of caudal 

 peduncle. Mouth, very oblique, lower jaw inchided; maxillary, pro- 

 tractile, not extending- to orbit; no l)arbels. Teeth slender, hooked, 

 a scarcely discernible grinding surface in two rows; 5 on outer row; 

 2 on the inner. Pseudob ranch ia^ present, (xill-rakers on tirst arch 

 slender; pointed. Alimentary canal, short. Peritoneum, silvtay. 

 Air-bladder, large; with a median constriction. Lateral line (extend- 

 ing along middle of body and caudal peduncle; straight, except a small 

 upper curve on anterior 4 or 5 scales. Scales large; 40 in lateral line. 

 Dorsal inserted a little in advance of ventrals, of 8 developed rays; 

 anterior rays weak; edge of tin somewhut concave. Anal similar in 

 shape to dorsal; 7 rays. Caudal deeply notched; the tips pointi^d. 

 Color, light, with a silvery lateral band. 



OtaVUi is probaljly related to Psetidondthora and TrlhoJodon. From 

 the former it differs in having the teeth in two rows; from the latter 

 in having a straight lateral line, larger scales, and a silvery peritoneum. 



This genus is named for Keinosuke Otaki, a graduate of Leland 

 Stanford Junior University and an ardent and successful naturalist. 



OTAKIA RASBORINA Jordan and Snyder, new species. 

 (Plate IX, tig. :;. ) 



Ti/j)e specimen.— ^o. 49401, U.S.N.M. 



Locality. — Lake Biwa, Japan. Collector, K. Otaki, 



Descrij)tion. — Head, 4 in length; depth, 4f ; depth of caudal peduncle, 

 ^\\ eye, 4 in head; snout, 3i; interor])ital space, 8^; height of dorsal, 

 5| in length; anal, Ti; length of pectoral, 0; ventral, Of; caudal, 3|; 

 number of dorsal rays, 8; anal, 7; scales in lateral series, 40; in trans- 

 verse series above ventral, 10; between insertion of dorsal and occi- 

 put, 17. 



Body and head, elongate; caudal peduncle, deep. Interorbital space, 

 convex. Eye, large, nearei' tip of snout than posterior edge of opercle, 

 a distance equal to one-half its diameter. Mouth, oblique; lower jaw 

 included; maxillary protractile; not extending posteriorly to edge of 

 orbit; no barbels. Gill-rakers on first arch, about 16; long, pointed. 

 Pseudobranchia^ present. Alimentary canal, short. Peritoneum, sil- 

 very. Dorsal, a little anterior to ventrals; the second ra}^ above inser- 

 tion of ventrals; tirst developed ray of dorsal longest, preceded by a 

 shorter, slender, closely-adnate, simple ra}'; other raj's gradualh' 

 shorter; edge of fin concave, giving a somewhat falcate appearance 

 when depressed. First developed ray of anal preceded by a weak, 

 simple, adnate ray; second ray longest; others shorter. Caudal 



