232 MEMOIRS OF THE CARNEGIE MUSEUM. 
Dorsal very slightly nearer base of caudal than tip of snout, its margin straight; 
anal inserted under last dorsal ray; pectorals extending over half-way to ventrals; 
latter reaching vent, not anal. Caudal forked. 
Seales small, especially on occiput and breast, lateral line slightly decurved, 
continuous. 
Color dark above, with fine irregular stippling; a darker band arising on snout 
and terminating with slight dilation at base of caudal, which has a basal spot in 
young; breadth of band equal to diameter of eye. A dark median band from oc- 
ciput to caudal. Upper fins slightly dusky, lower clear. 
We have five specimens, 62 to 87 mm. in total length, all from Lake Biwa. 
The species may be readily separated from Japanese species of Leuciscus by 
the insertion of the anal fin, which lies under the last ray of the dorsal, and by the 
small seales. ° 
In form and coloration this species resembles the American genus Rhinichthys. 
In the form of the head it differs considerably from the type of Pseudaspius. 
resembling more the species of Leuciscus. It may be generically different from 
Pseudaspius. It has an ally in Korea, which we have also referred to Pseudaspius, 
61. Zacco platypus (Temminck & Schlegel). 
Lake Biwa at Matsubara, No. 6219 many, Okayama No. 6013a. 
A young male much slenderer than the others and the color more vivid. Fe- 
males with lower fins. 
62. Zacco temmincki (Temminck «& Schlegel). 
Okayama, No. 6081a. 
63. Zacco sieboldi (Temminck & Schlegel). 
(Zacco mitsukurii Tanaka.) 
Lake Biwa at Matsubara, Nos. 6210a—h; Sendai; Nagoya, No. 6449a. 
Teeth 1, 4, 5-4, 4,1. Scales 62. 
64. Opsariichthys uncirostris (Temminck & Schlegel). 
Lake Biwa, at Matsubara, No. 6278 many. 
This abundant chub is an excellent food-fish and deserves introduction into the 
lakes of America. 
65. Pseudorasbora parva (Temminck & Schlegel). 
Yodo River, Osaka, No. 6283, many; Lake Biwa, at Matsubara. 
66. Leuciscus hakuensis Giinther. 
Two specimens, No. 6331la—b, from Lake Biwa at Matsubara, differ from all 
others in the lower fins and slightly shorter maxillary. One from Hakodate, No. 
6195a, has scales 75; another from Sendai, No. 6245a, has scales 16-79-13. This 
