>3ö 



S. TAN AK A 



Ground coin- varies from darle brown to li;^ht brown. All 

 specimens with distinct parr-mark except the largest one which shows 

 the mark very faintly and is supplied with more or less distinct spots. 



22. Plecoglossus altivelis (Schlegel). 



Local name : Ayu. 



No specimen of the species i; represented in the collection, but 

 several reports attest to the presence of the spocies in the province. 



Pœciliidae. 



23. Oryzias latipes (Schlegel). 



Local name : Medaka ; Mezaka ; Komekura ; Mekugi ; Urume. 

 Sixteen specimens, the largest being 3.3 cm. long as measured to 

 root of middle caudal rays. 



Cottidee. 



24. Cottus pollux (Günther). 



Lor. il name: Kazika ; Kazikanbö ; Ubakazika; Okazika ; Kyara. 



Numerous specimens, the largest being 9.5 cm. long as measured 

 to root of middle caudal rays. 



Rays of pectoral all simple, the longest rays reaching to vertical 

 through origin of anal ; ventral may or may not reach beyond vent. 

 Coloration variable to some extent ; five cross-bars on side cf body 

 always present. Vomer toothed, but palatines without teeth. One 

 prcopercular spine present, the spine being simple, very short, and 

 curved inward and upward. Sometimes the spine is concealed in the 

 skin, but is always visible from outside. In this district Cottus kazika 

 Jordan & Starks, which is easily distinguished from Cottas pollux by 

 having 4 prcopercular spines instead of I, seems not to occur in the 

 district. V>y the way, I think it probable that no species of Uranidea 

 occurs in Japan although Dr. Hilgendorf had described two species 

 from our country, reini and dyboivskii. 



