848 PROCEEDINGS OF THE NATIONAL MUSEUM. 



Otaru, Lake Biwa at Karasaki, Noyshiro (collection K. Otaki), Hir- 

 oshima, a lake near Oide (collection Jouy), and Yokohama (collection 

 Joiiy). The species freely enters salt water. 



(Name from Lake Hakonc on the mountain between Izu and Sagami.) 



25. LEUCISCUS TACZANOWSKII Steindachner. 

 KIKI. 

 /ymn«'«.<{<ao2rm(WwA-v,/ Stein i)A('HNKK, Iclitli. Beitr., X, 1881, p. 16; Sea of Japan. 

 (Pectoral \l in lioad, misprinted "S^.") 



Head 4; depth 4f ; D. HI, 7; A. HI, 8; P. 17; V. 10; scales 93 in thel 

 lateral line (17 scales between the origin of dorsal and lateral line) and' 

 14 1)etwe(Mi the latter and middle of belly; pharyngeal teeth 5, 2 — 2,4; 

 width of head 2i in its length; snout 8i in head; ej^e of in head; inter- 

 orbital space a little over 3; pectoral li; yentral 2. 



Body elongate and compressed. Head elongate, pointed, com- 

 pressed, and the sides flattened; upper profile of head almost straight 

 to tip of snout; snout long, rather blunt and scarcely projecting be3^ond 

 the mandible; eye small, anterior. If in snout; mouth moderate, the 

 maxillary protractile, not reaching posteriori}^ as far as the eye, and 

 not very oblique; lips fleshy, not dilated; pharyngeal teeth with grind- I 

 ing surface, slightly hooked; nostrils close together on the upper sides t 

 of the snout, and much nearer the anterior edge of ej^e than tip of the [i 

 latter; interorbital space and top of the head rather broad and slightly J 

 convex. Gill-openings large; gill-rakers short, 4 + 10; pseudobran- 

 chise present. Intestine with a single convolution ; peritoneum silvery. . 



Scales very small, cycloid, and of more or less even size; no pectoral I 

 flap; a small ventral flap. 



Origin of dorsal nearer base of caudal than tip of snout, the first I 

 developed ray the highest reaching beyond the others to the origin of I 

 the anal when depressed, the base of the fin If in its height and its 

 margin nearly straight; anal inserted midway between tip of pectoral i 

 and base of caudal, the first developed ray the highest reaching beyond I 

 the others when depressed, the base of the fin 1^ in its height, and its 

 margin nearly straight; caudal deepl}^ emarginate, the lobes pointed. 

 Pectoral reaches about two-thirds the distance to ventral; ventral I 

 inserted .slightly before the origin of the dorsal, and reaches two-thirds 

 the distance to anal. Caudal peduncle long, its least depth 2f in head. 

 Lateral line slightly decurved, and continuous. 



Color in alcohol dark ])rown, slightly olivaceous above, the lower 

 surface of the body pale or whitish; dorsal, caudal, and pectorals 

 grayish or brownish black, the other fins pale. 



Length, lOf inches. 



Fresh waters of .Japan. We have a number of examples of this 

 species from Lake Jusan, in Aomori, Noyshiro (collection, K. Otaki), 

 and Junsaburogata (Nishitsu Riverj, in Aomori (collection, S. Saito). 



Its distribution is probably mainly northern. 



(Named for Professor Taczanowsky, its discpyerer.) 



