The Fresh Water Fishes of the Island of Formosa. 301 



head, cheeks, and snout with a number of wavy, ])ale-brown, longi- 

 tudinal streaks; membrane of the dorsal fins grayish, spines fuscous, 

 soft rays spotted with dark; ventral fin whitish; pectoral and anal 

 dusky, the latter bordered with white; caudal fin with wavy vertical 

 cross-bands. 



Length of body 65 mm. 



Described from a specimen from Shinchiku, collected by T. Aoki 

 in December, 1916. 



Habitat: Shinchiku (a single specimen). 



Remarks: The present species much resemble Rhinogobiiis liadrop- 

 tcnis^'" from Japan. It differs, however, in having an entirely naked 

 head. 



71. Rhinogobius caninus (Cuv. & Val.). 



1837. Gobiiis caninus Cuv. & V.al., Hist. Nat. Poiss., XII, p. 86. — Bleeker, 

 Verh. Batav. Gen., XXII, 1849, p. 27. — Gltnther, Cat. Fish., Ill, 1861, 

 p. 38; China; East Indian Archipelago. 



1905. Rhinogobius caninus Jordan & Seale, Proc. U. S. Nat. Mus., XXVIII, 

 p. 796; Negros. — Jordan & Richardson, Bull. U. S. Bur. Fish., XXVII, 

 1908, p. 259; Iloilo; Lubang. — ^Jordan & Richardson, Mem. Carneg. 

 Mus., IV, no. 4, 1909, p. 200; Takao, Formosa. 



1912. Ctenogohius caninus Snyder, Proc. U. S. Nat. Mus., LXII, p. 514; Okinawa. 



Head 3.45 in length; depth 5.42; caudal peduncle 2.44 in head; eye 

 4.8; interorbital space 8; snout 3.28; D. VI, i, 9; h. 9; P. 19; twenty- 

 eight scales in a lateral series, ten scales between the origin of soft 

 dorsal and that of the anal. 



Body oblong, compressed, depth nearly subequal throughout the 

 body, gradually tapering posteriorly; head rather high, not depressed; 

 snout rounded anteriorly, its profile slightly arched, interorbital 

 space narrow; mouth oblique, its angle reaching beyond a vertical 

 through anterior margin of orbit; lower jaw longer than the upper, 

 with two large canine teeth on each side; teeth on both jaws in a villi- 

 form band, outer ones larger; tongue rather short, truncated in front; 

 eyes high in head, much nearer tip of snout than the end of opercle; 

 nostrils separated, in front of e^-e, the posterior slightly larger than 

 the anterior. 



Dorsal fins well separated, none of the spines elongated, when 



^^ Ctenogohius hadroplerus Jordan & Snyder, Proc. U. S. Nat. Mus., XXIV, 1901, 

 p. 60. 



Rhinogobius hadroplerus Jordan, Snyder, & Tanaka, Journ. Coll. Sci. Tokyo. 

 XXXIII, 1913. p. 343. 



