The Fresh Water Fishes of the Island of Formosa. 261 



Body naked, smooth; lateral line continuous, slightly depressed, 

 running along the middle of the sides. 



Color in formalin l)ro\vnish gray above, mottled with darker spots, 

 with traces of j)aler and darker streaks; lower surface, lips, and throat 

 whitish. 



Length of body 305 mm. 



Described from a specimen from Shokwa, collected by T. Aoki in 

 December, igi6. 



Habitat: The present fish is very common in streamlets and canals. 

 My specimens came from Jitsugetsutan (Lake Candidius) ; Shokwa; 

 Taihoku; Kiburan, Giran. 



Remarks: The color of the lower parts is variable. In two specimens 

 from Taihoku the belly is mottled with brown, while another from the 

 same locality has a nearly white belly with indistinct brown markings. 



Fluta alba is capable of living a considerable time out of water. 



Measurements of Fluta alba. 



Family ANGUILLID^. 

 Genus Anguilla Shaw\ 



1804. Anguilla Shaw, General Zoology, IV, p. 15. (Type Murcena anguilla 

 Linnaeus.) 



Body elongate, compressed behind, covered with imbedded scales 

 which are linear in form and placed obliquely, some of them at right 

 angles to others. Lateral line well-developed. Head long, conical, 

 moderately pointed, the rather small eye well forward and over the 

 angle of mouth. Teeth small, subequal, in bands on each jaw and a 

 long patch on the vomer. Tongue free at tip. Lips rather full, with 

 a free margin behind, attached by a frenum in front. Lower jaw 

 projecting. Gill-openings rather small, slit-like, about as wide as 

 base of pectorals and partly below them. Nostrils superior, well- 

 separated, the anterior with a slight tube. Vent close in front of anal. 

 Dorsal inserted at some distance from the head, confluent with the 



