The Fresh \\'ater Fishes of the Island of Formosa. 307 



the depressed caudal peduncle; depth of caudal peduncle 3.4 in head; 

 head pointed; lower jaw projecting width of pupil; mouth large, 

 maxillary reaching vertical from back of pupil; jaws, vomers and 

 palatines with rows of fine, sharp-pointed teeth; tongue deeply notched; 

 origin of spinous dorsal nearly an eye-length behind insertion of 

 ventrals, its base 2.4 in head; base of soft dorsal 1.5 in head; longest 

 dorsal spine 2.25; longest ray twice in head; origin of anal under 

 second ray of soft dorsal, equidistant between base of caudal and 

 back of eye; pectoral 1.3 in head; ventrals 1.4; depth of membranous 

 cup of united ventrals two-thirds of length of eye; caudal 1.3 in head, 

 rounded; a large anal papilla with notch behind. 



Color in spirits brownish-olive, back and caudal peduncle crossed 

 obliquely by four broad saddle-like bands of dark color; membranes 

 of dorsals and of anal chiefly blackish, with some small spot-like 

 intervals of paler on these and on rays; caudal and ventrals barred 

 or checkered with dark; pectorals lightly speckled with dusky, with 

 darker and denser specks below at base; under parts unevenly punct- 

 ulated, the dots forming indistinct bars on chin and lower jaws; tip of 

 lower jaw blackish. 



This species is near Glossogobius vaisiganis from Samoa, but differs 

 in the details of coloration, notably in the sharply checkered ventral 

 fin. (Jordan & Richardson). 



Habitat: Takao. (Jordan & Richardson). Not seen. 



Genus Acanthogobius Gill. 

 1859. Acanthogobius Gill, Proc. Ac. Nat. Sci. Philad., p. 145. (Type Gobius 



flavimanus Temminck & Schlegel.) 

 1863. Synechogobius Gill, Proc. Ac. Nat. Sci. Philad., p. 266. (Type Gobius 



hasta Temminck & Schlegel.) 



Body oblong, little compressed, covered with medium-sized roughish 

 scales; cheeks with small scales; snout rather long, the head rounded 

 in profile; mouth moderate, oblique, the jaws about equal, the teeth 

 moderate; tongue truncate or very slightly notched; isthmus rather 

 broad, the gill-openings slightly continued forward below; no flaps on 

 shoulder-girdle. Dorsal fins rather long, the first composed of seven 

 to nine slender spines, the second of fourteen or fifteen soft rays; anal 

 of twelve to thirteen rays. (Jordan & Snyder). 



76. Acanthogobius ommaturus (Richardson). 

 1846. Gobius ommaturus Rich.^rdson, Voy. Sulph. Fish., p. 146, PI. LV, Figs. 1-4; 

 Woosung, Yang-tze-kiang. — Gunther, Cat. Fish., Ill, 1861, p. 77; Amoy. — • 

 RuTTER, Proc. Nat. Sc. Philad., Jan., 1897, p. 85; Swatow. 



