The Fresh Water Fishes of the Island of Formosa. 297 

 68. Rhinogobius giurinus (Rutter). 



1897. Gohius giurinus Rutter, Proc. Acad. Nat. Sc. Philad., p. 86; Swatow, 



China. 

 1901. Gobius giurus Abbott. Proc. U. S. Nat. Mus., XXIII, p. 491; Tiensin. 

 1903. Ctenogohius plalycephahis Jord.\n & Ev^ermann, Proc. U. S. Nat. Mus., 



XXV, p. 362; Taihoku. 

 1909. Rhinogobius giurinus Jordan & Rich.\rdson, Mem. Carneg. Mus., I\', 



no. 4, p. 200; Kotosho; Taihoku, Formosa. 



Head 3.47 in length; depth 4.33; depth of caudal peduncle 2.5 in 

 head; eye 4; interorbital space 7.66, snout 2.5; D. VI, 9; A. 10; P. 19; 

 twenty-nine scales in a lateral series, nine scales between origins of 

 the second dorsal and anal. 



Body elongate, a little deeper than wide, posterior part compressed; 

 head broader than deep; snout rather long, sharp, anterior margin 

 acutely rounded; interorbital space concave, narrow; mouth moderate, 

 somewhat oblique, its angle scarcely reaching a vertical through 

 anterior margin of orbit; lips thick; jaws subequal; teeth in two series, 

 outer ones small, canine-like, second series in upper jaw minute, no 

 large caniniform teeth; tongue broad, the tip truncate; eye high in 

 head, upper margin projecting, situated midway between tip of snout 

 and posterior edge of opercle; gill-openings not extending far forwards; 

 gill-rakers 2 + 8 on first arch; no barbels on lower jaw. 



Dorsal fin separated, rather short, spinous rays not filamentous, 

 when depressed not reaching the second dorsal; soft rays a little longer 

 than the spines: pectorals rounded, extending to the vent above; 

 ventra'.s united, not adnate to the belly, the tips not reaching the 

 vent; the anal inserted below second ray of second dorsal, when 

 depressed extending as far posteriorly as the second dorsal; caudal iin 

 rounded. 



Head, except the occiput, naked; body covered with large, regular 

 ctenoid scales; those on the occiput smooth and cycloid. 



Color in formalin pale olive-gray above, lower parts whitish; head 

 spotted with dark, cheek with oblique, rather wavy bars; sides with a 

 number of irregular black spots; back mottled with dark; occiput with 

 closely crowded dark blotches; dorsal fins with dusky spots arranged 

 in longitudinal rows; caudal fin fuscous, with indistinct wavy cross- 

 band near the base; pectoral fins dark; ventrals and anal whitish. 



Length of body 65 mm. 



Described from a specimen from Shimo-Tamusui River near Ako, 

 collected by T. Aoki in December, 1916. 



