294 



Annals of the Carnegie Museum. 



minute; gill-openings lateral, in front of the base of the pectoral; gill- 

 membranes broadly united to isthmus. 



Two dorsal fins, the first dorsal inserted above the posterior half of 

 pectoral, nearer to the origin of second dorsal than to the tip of snout, 

 with six flexible spines, of which the third is filiform, reaching the 

 anterior third of the base of second dorsal, fin-membrane united to the 

 back behind the last spine; second dorsal opposite to the ventral, 

 elongate, its rays subequal in height; pectoral fins lateral, leaf-shaped, 

 with rather sharp tip, reaching midway between origin of ventral and 

 that of the anal; ventrals united, forming a small semicircular disk, 

 more or less adherent to the belly; origin of the anal slightly behind 

 that of the second dorsal, similar in form to the latter; caudal fin 

 rounded. 



Body covered with ctenoid scales, those on the anterior parts of 

 body and the base of caudal cycloid; head entirely naked; no lateral 

 line. 



Color in formalin brownish gray, paler below; dorsal surface with 

 about ten black cross-bands, some of which extend downwards, first 

 band in front of the base of pectoral, second one in front of the origin 

 of first dorsal; head uniformly dark gray; all the fins dark gray; first 

 dorsal sparingly spotted with dark, each ray of the second dorsal with 

 a series of pale brown spots; proximal part of caudal fin darker. 



Length of body 120 mm. 



Described from a specimen from Tamusui Ri\er near Shinten, 

 collected by T. Aoki in December, 1916. 



Habitat: Tamusui River; Tozen River; Koranronsho, Taichu; 

 Shinchiku; Bokusekikaku; Choso River (Koshiryo); Taiko. 



Measurements of Sicyopterus japoniciis. 



Locality. 



Tamusui River 

 Tamusui RivxT 

 Tamusui River 

 Tamusui River 

 Tozen River. . . 

 Tozen River. . . 

 Choso River. . . 



Heirinbi 



Taiko 



2.66 



2.44 

 2.44 



2.40 



2.7s 

 2.50 

 2.50 

 2.40 

 2.31 



2.18 



2.10 

 2.27 



2.33 



2 



2.31 



1. 12 60-15 

 1-69 59-16 



I. S3 160-16 



hJ 



120 

 116 

 120 

 IIS 

 113 

 140 

 105 

 112 

 166 



