A I'RELIMINABY NOTE ON THE FISHES OF LAKE BIWA. 121 



of fishes living in the lake. The following list founded mainly on this 

 collection will, I hope, be of some interest to the readers of this journal. 



1. Opsariichthys temminkii, ScJiIeg. 



Jap. Name : Mutsu. Loc. Hikone (Matsubara), Otsu. 



2. Opsariichthys platypus, Schleg. 



Jap. Name : Oikawa. ,, ,, ,, 



8. Opsariichthys uncirostris, Schleg. (Figs 1 — 3). 



Jap. Name : Hasu. ,, ,, , Nagahama, 



We obtained six specimens of this interesting fish, three of which 

 from Nagahama, and three from Matsubara, a small fishing village close 

 by Hikone. All the Matsubara specimens were females, while two of 

 the Nagahama specimens were males. 



Schlegel in his great work— Faun. Japon. Poiss. p. 212-213— gives 

 a very detailed description of the fish from three specimens in his hands, 

 the one of which was only " cinq pouces et demi," while the other two 

 were still smaller, being nearly " quatre pouces et demi." 



The exact measurements of our specimens are as follows : — 

 ^ I, The lagest male from Nagahama. 



Total length, from the tip of the snout to the end 



of the tail 300 mm. 



Geatest breadth, taken slightly in front of the origin 



of the dorsal fin 62 ,, 



Distance from the tip of the lower lip to the 



occiput J. .i-uut .';k I . ..i4i.< iO/v.', •v.'Jc'if^' 45 „ 



c^ II, also from Nagahama. 



Totallength 270 „ 



Greatest breadth • 55 ,, 



Distance from the tip of the lower lip to the 

 occiput 44 



J) - 



