S84 Zaceo. 
Habitat.—Fresh waters of central and southern Japan; Formosa. 
Head 4, height of body 32 in total length without caudal. Eye 4}, interorbital 
23, snout 23 in head. D. II, 7; A. III, 9; P. 16; V..9; C. 19; scales 83—42—4}. 
Body rather elongate, compressed, its contours evenly curved dorsally and 
ventrally; caudal peduncle rather high, narrow, compressed. Head rather small, 
compressed, its contour abruptly steep from nape forward, then concave, then convex, 
finally very steep and straight; eye lateral, high; interorbital wide, convex; nostrils 
close together, nearer anterior rim of eye than tip of snout; anterior nostril with 
elevated margin, especially in its posterior part; mouth subinferior, lower jaw included; 
maxillary extending to vertical through middle of space between nostirils and anterior 
rim of eye. Gill openings narrowly joined to the isthmus ; gill-rakes on first gill-arch 
4+10, short, oblong, pointed; pharyngeal teeth 5, 4, 2—2, 3, 4, slightly hooked, 
edges entire; pseudobranchize well developed. Dorsal equidistant from posterior rim 
of eye and base of caudal, its first branched ray highest, its length slightly longer than 
head without snout; anal inserted well behind dorsal and nearer base of caudal than 
origin of pectoral by length of snout, its second branched ray longest, as long as the 
distance between origin of the fin and base of caudal; pectoral placed low, with slightly 


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