The Fresh Water Fishes of the Island ok Formosa. 271 



short, moderately broad, truncate in front, interorbital space rather 

 flat; mouth subinferior, slightly oblique, its angle reaching'a vertical 

 through anterior margin of orbit, cleft of mouth 1.66 in the transverse 

 distance between angles of mouth; lips rather thin, upper lip much 

 thicker than the lower; the angle between two mandibulary bones a 

 right angle; lower jaw shorter than the upper, its outer edge rather 

 sharp, with a short median keel at the tip which fits into the corre- 

 sponding concavity on the roof of the upper jaw; teeth on the upper jaw 

 minute, scarcely visible without a lens, closely set; eyes hidden 

 anteriorly and posteriorly by a broad adipose membrane; nostrils 

 separated, anterior nostril in a very short tube, posterior nostril slit- 

 like, in front of eye above. 



Dorsal fins well separated; origin of the spinous dorsal midway 

 between tip of snout and base of caudal, with pointed scaly flaps on 

 both sides of the base, length of the anterior spine twice in head; soft 

 dorsal inserted behind the origin of anal, anterior ray^ longest; pectoral 

 not reaching spinous dorsal, its base above the middle of body; 

 ventral inserted nearer the origin of the spinous dorsal than that of 

 the pectoral, with a scaly, pointed flap near the base; anal fin opposite 

 the soft dorsal, inserted in front of the origin of the latter, caudal fin 

 forked; depth of caudal peduncle 2.66 in head. 



Head and body covered with large cycloid scales; all the fins except 

 the spinous dorsal with very few scales; base of the caudal covered 

 with large scales. 



Color in alcohol dark gray above, belly and lower half of the sides 

 silver}'; sides with dark longitudinal stripes along the rows of scales; 

 pectorals, dorsals, and caudal fin dusky, other fins whitish; a black 

 spot near the base of pectoral. 



Length of body 132 mm. 



Described from a specimen from Inzanpo, Giran, collected by T. 

 Aoki in August, 1917. 



Habitat: Inzanpo and Ritakukan, Giran. Giran; Keeking; Taihoku. 

 (Jordan and Evermann.) 



Remarks: The present species is very closely related to Mugil 

 cephalus Linnaeus, differing mainly in the angle between the two 

 mandibulary bones. In the latter it is always obtuse instead of being 

 a right angle, and the cleft of the mouth is contained twice in the 

 distance between the angles of mouth. 



