The Fresh Water Fishes of the Island of Formosa. 281 



Rc))iarks: The present species is one (if llic brackish water lishes 

 which enter the streams. 



Measurements of Kuhlia marginata. 



Locality. 





Taniusui River 

 Tamusui River 

 Tamusui River 



Inzanpo 



Koshiryo 



1.863 

 1. 81 3.27 

 1.76 3.18 



2 [3 

 2 3 



3-40 

 27 

 25 



40 



4-50 

 4.18 

 3-80 

 4 



503-25 



4^-42-12 

 5 -40-13 

 5 -40-13 

 4 -40-12 

 4I-40-12 



205 

 181 

 132 

 132 

 104 



Family OPHICEPHALID.T:. 

 Artificial Key to the Formosan Genera of Ophicephalid.«. 



A. Ventral fins present Ophicephalus. 



B. Ventral fins absent Channa. 



Genus Ophicephalus Bloch. 



1794. ophicephalus Block, Naturg. Ausl. Fische, VIII, p. 137. (Type Ophiceph- 

 alus punctalus Bloch.) 



Body elongate, subcj'lindrical anteriorly; head depressed, covered 

 with plate-like scales. Eyes lateral. Gill-openings wide, the mem- 

 branes of the two sides connected beneath the isthmus; four gills; 

 pseudobranchiae none. A ca\Tty accessory to the gill-cavity, for the 

 purpose of retaining water; no suprabranchial organ developed. 

 Teeth in the jaws, vomer, and palate. One long dorsal and anal fin, 

 without spines; ventral fins thoracic, composed of four to six rays, 

 the outer of which is not branched. Lateral line interrupted. Air- 

 bladder present. 



Distribution: British India; Ceylon; Borneo; Sumatra; Mindanao; 

 Luzon; Bengal; Siam; Hindostan; Indo-China; Formosa; China; 

 Amur Province. 



Synopsis of the Formosan Species. 



a. Depth of body less than 6 in the length; nine scales between orbit and the tip 

 of operculum; eleven scales between lateral line and the root of ventrals. 



tadianus. 



aa. Depth of body more than 6 in the length; twelve scales between orbit and the 



tip of operculum; fourteen scales between lateral line and the root of ventrals. 



maculatus. 



