FRESH-WATER FISHES FROM SHINANO. 



127 



I [atta. The two dorsals arc continuous with .1 deep notch between, 

 often showing a strong inclination to separate from each other. Some 

 specimens of about 13 cm. in length are much nearer to Lampetra 

 mitsukurii than to Lampetra japonica. 



Siluridse. 

 ?. Liobagrus reini (Hilgendorf;. 



Liobagrus sugiiliii Regan, 1908. 



Local name: Sasuri ; Sasori ; Akaze. 



Numerous specimens, the largest being 10.6 cm. long as measured 

 to the root of middle caudal rays. 



Dark brown above, lighter below ; rather sparsely sprinkled with 

 pale spots much smaller than the diameter of eye. Caudal extending 

 forward to unite with dorsal, with a rather obtuse notch at the 

 boundary of the latter fin. 



The species shows individual variations in the slenderness of 

 body, in the width of interorbital and the length of fin spines, even 

 in specimens from same locality. Measurements of some examples are- 

 as follows : 



Specimen 



A 



13 



C 



D 



E 



F 



Length as measured to root of 



9. 1 cm. 



74 cm. 



7.0 cm. 



6.4 cm. 



8.6 cm. 



8.5 cm. 





1-4 



1.2 „ 



I S 



12 » 



1.5 » 



1-7 » 



Length of head 



2.2 „ 



1.6 „ 



1-7 » 



1-3 » 



2.0 „ 



1-9 





0.S5 „ 



0.6 „ 



0.7 » 



CSS „ 



0.8 „ 



0.8 „ 



Judging from the numerous specimens on hand, Liobagrus reini 

 described by Jordan and Fowler in 1903 seems to differ so very 

 slightly from Liobagrus sitgabii Regan that I hesitate to draw specific 

 distinction between the two, although most of the specimens stand 

 nearer to sugubii. 



