MU 28 



Notes on a Collection of Fishes made by Prof. Ijima 

 in the Southern Parts of Sakhalin. 



BY 



Shigeho Tanaka, Rigakmhi. 



Zoological Institute, Science College, Imperial University of Tokyo. 



{With PI. /X.) 



The fishes collected by Professor Ijima and his party in the southern 

 parts of Sakhalin during May- to September 1906, was kindly placed at 

 my disposal for study. I now beg to report on it. 



The collection was done principally in the following localities : 

 Korsakoff; Pervaya, Ftaraya and Tretiya Padj on the coast along the 

 Lososei Bay ; the.-' Susuya River ; Vladimirofka and Troitskoe in the 

 interior ; Chipesani Village, Lake Chipesani and Lake Busse along the 

 northeast of Aniwa Bay ; Nayoro, Seraroko and Airop on the eastern 

 coast. 



I have referred the specimens to sixty-three species. Most of them 

 are subarctic forms, of which only a few are those that occur also in middle 

 Japan. Two species in the collection I have considered to be new to 

 science and shall propose to call Porocottus nigrescens and P. ijimai. 



Family Petromyzonidae. 



1. Lampetra mitsukurii (Hatta). 



A single specimen, 12 cm. long, obtained at Tretiya Padj (July 14). 



According to Berg, Ca) Lampetra fluviatilis (Linné) is found in 

 Sakhalin. The specimen before me seems to be nearer to L. mitsukurii 

 rather than to L. fluviatilis, although it is too young to admit of accurate 

 identification. 



a) Zoo!. Zentralblatt, Bd. 14, No. 5, 1907, p. 149. 



