The Fresh Water Fishes of the Island of Formosa. 197 



Described from a specimen from Taiko River, collected by T. Aoki 

 in December, 1916. 



Habitat: Taiko River (five specimens). 



Family CYPRINID/E. 



Artificial Key to the Formosan Genera. 

 I. Anal fin very short, with five or six branched rays. 



A. Lateral hne running along the median line of the tail; dorsal fin opposite to 



ventrals. 

 a'. Dorsal fin with more than nine branched rays. 



b'. Pharyngeal teeth in three series, the outer molar-like; barbels 



two on each side; a strong dorsal spine Cyprinus. 



b". Pharyngeal teeth in a single series, barbels none; a strong dorsal 



spine Carassius. 



b'". Pharyngeal teeth in three series, not molar-like; without osseous 

 dorsal rays. 

 Snout more or less swollen; each lip with an inner transverse 

 fold, which is covered with a deciduous horny substance form- 

 ing a sharp edge; dorsal 13-20 Labeo. 



a" . Dorsal fin with no more than nine branched rays. 

 b' . Pharyngeal teeth in three series. 



c' . Lower jaw transverse, with a narrow lip which is not con- 

 tinuous, with a sharp inner transverse edge; barbels four. 



Acrossocheilus. 



c" . Mouth transverse, inferior; lower jaw not covered by lip, 



with a horny layer inside, rather sharp; barbels two, minute. 



Scaphesthes. 

 c'" . Mouth arched, without inner fold or other peculiarities; 

 lips fleshy. 

 d' . A recumbent spine in front of the dorsal; barbels four. 



Spiyiibarbus. 

 d" . No recumbent spine; barbels four, or two, or none. 



e' . Head with mucous cavities; scales large; lips thick; 



barbels two Hemibarbiis. 



e". Head without mucous cavities; scales moderate; 

 lips thin. 



/'. Barbels four Barbodes. 



f". Barbels two Capoeta. 



/'". Barbels none Puntius. 



