NO. 1334. JAPANESE CYFRINOID FISHES— JORDAN ADD FOWLER. 855 



in Omi (collection in Imperial Museum), Funayado in Kiu.siu. and 

 Karasaki on Lake Biwa (collection K. Otaki). 



Breedino- males, like those of Zavco p/aff/j)>/s, have the sides of the 

 head furnished with many larg-e, horny tubercles, also the lower sur- 

 face of the caudal peduncle and the anal tin. The rays of the anal are 

 expanded and elongated. The color of the head is deep blackish- 

 brown. Young specimens always have a blackish lateral ])and. 



(Named for Philip Fredrik Siebold, of Leyden, who collected about 

 Nagasaki and Omura. and under whose direction the Fauna Japonica 

 was prepared.) 



18. OPSARIICHTHYS Bleeker. 

 OpxariichthijH Bleekek, Atl. Ichthyol. Cyprin., ISHO, j). 28 {unflrostris). 



Body elongate, oblong, and compressed. Head rather pointed, 

 greatly compressed, and the sides flattened; snout long; eye small, 

 high; mouth large, very oblique, the maxillary reaching anterior mar- 

 gin of eye, and with a deep notch into which each ramus of the mand- 

 ible tits; no barl)els; teeth 5, 4, 2 — 2, 4, 5, on long, thin, phaiyngeal 

 bones; interorbital space broad and flat. Gill-rakers short, 8-|-S). 

 Intestine short. Peritoneum silvery. Scales moderate, about 50, and 

 more or less narrowly imbricated; a short pectoral flap. Origin of 

 dorsal midway between tip of snout and base of caudal; anal basis 

 long, with 9 developed rays, and its origin falling a little anterior to 

 the tip of the depressed dorsal; caudal deeply emarginate; ventrals 

 inserted below the origin of the dorsal. Lateral line continuous, and 

 decurved. Breeding males have the head, lower surface of the caudal 

 peduncle, and the anal tin furnished with numerous small horny tu))er- 

 cles. The anal flu has its rays elongate and more or less adipose. 



Species of large size, inhabiting the Japanese lakes, especially deli- 

 cate as food. 



{ot/:apiov^ a little fish; iXOvC^ fish.) 



31. OPSARIICHTHYS UNCIROSTRIS (Schlegel.) 

 HASU. 



Leuciscm undrostris Schlegel, Fauna Japonic^a, Poiss., 1846, ji. 211, pi. en, 



fig. 2; near Nagasaki. 



Opsariichthys undrostris Gunther, Cat. Fish., VII, 1868, p. 295 (copied).— 



Sauvage, Bull. Soc. Philoni. 1883, p. 5; Lake Biwa— Ishikaw.v, Zool. :Mag., 



VII, (Tokyo) 1895, p. 121, figs. 1, 2, 3; Lake Biwa in Omi— Ishikawa, Trel. 



Cat. 1897, p. 12; Nagahama and Matsubara on Lake Biwa— Jordan and 



Snyder, Proc. U. S. Nat. Mus., XXIII, 1900, p. 344; Lake Biwa; Coll. K. 



Otaki— Jordan and Snyder, Annot. Zool. Japan, III, (Tokyo) 1901, p. 47; 



Lake Biwa. 



Head 3f ; depth Si; D. Ill, 7; A. Ill, 1>; P. I, 10; V. 9; scales 



50 in the lateral line; 10 scales between the origin of the dorsal and 



the lateral line, and 5 between the latter and the middle of belly; 



