172 Annals of the Carnegie Museum. 



I. Plecoglossus altivelis (Temminck & Schlegel). 

 1846. Plecoglossus altivelis Temminck & Schlegel, Fauna Japonica Poiss., 

 p. 229, PI. CV, Fig. i; no locality. — Gunther, Cat. Fish., VI, 1866, p. 165; 

 Japan; Formosa. — Ishikawa, Zool. Mag. Tokyo, VII, 1895, p. 129; Japan. — 

 Jordan & Snyder, Proc. U. S. Nat. Mus., XXIII, 1901, p. 349; Lake Biwa. — 

 Proc. U. S. Nat. Mus., XXIII, 1901, p. 744; Numata, Tsushima.— Proc. 

 U. S. Nat. Mus., XXIV, 1902, p. 584; Ishikari River, Niigata; Aomori; 

 Same; Matsushima; Sendai; Morioka; Tokyo; Tama River; Daij^a River; 

 Gifu; Lake Biwa; Osaka; Wakanoura; Kobe; Hiroshima; Kurume; Nagasaki; 

 Tamusui River, Formosa. — Jordan, Ann. Zool. Jap., IV, 1902, p. 75, — 

 Jordan & Evermann, Proc. U. S. Nat. Mus., XXV, 1903, p. 323; Formosa. — 

 Jordan & Richardson, Mem. Carneg. Mus., IV, no. 4, 1909, p. 167; For- 

 mosa. — Smith & Pope, Proc. U. S. Nat. Mus., XXXI, 1905, p. 463; Gifu. — 

 Snyder, Proc. U. S. Nat. Mus., XLII, 1912, p. 403; Tsuruga'.— Jordan; 

 Snyder, and Tanaka, Journ. Coll. Sci., Tokyo, XXXIII, 1013, p. 44, 

 Japan; Hokkaido; Corea; Formosa. — ^Jordan & Metz, Mem. Carneg. 

 Mus., ^T, 1913, p. 10, Fusan, Corea. 



Ayu (Japan); Kyarihii (Formosa). 



Head 4.88 in length; depth 4.27; D. 10, A. 17; P. 14; V. 8; width of 

 head 2 in its length; eye 5.33 in head; interorbital space 2.76; snout 

 2.76; maxillary 2; scales in the lateral line about 150, in an oblique 

 series between origin of dorsal and lateral line 20, between the latter 

 and the middle of belly 20, between lateral line and the root of ventral 

 13; pectoral 1.22 in head; ventral 1.22; gill-rakers 16 + 19, 



Body oblong, a little compressed, curvature of the dorsal profile 

 stronger than the ventral; head rather small, triangular, its dorsal 

 surface slightly convex; snout rather long, acutely pointed; inter- 

 orbital space slightly convex; mouth large, oblique, its angle reaching 

 a vertical through the posterior border of orbit; lips thick; premaxil- 

 lary well-developed; lower jaw shorter than the upper; palatines with 

 minute teeth; si.x premaxillary teeth, minute and sharply pointed.; 

 maxillary teeth modified into serrated plates, twelve on both jaws; 

 eyes moderate, superior and anterior; nostrils close together; gill- 

 rakers short and slender. 



Origin of the dorsal nearer tip of snout than base of caudal, opposite 

 the ventral, rather high, each ray rather stiff; adipose dorsal very 

 small, inserted above posterior third of the base of anal; pectoral as 

 long as the ventral, not reaching the latter; ventral inserted below 

 origin of dorsal, not reaching the vent; anal fin elongate, rather low, 

 outer margin concave; caudal peduncle slender, its depth 2.18 in the 

 length of head. 



