JORDAN AND THOMPSON: FISHES OBTAINED IN JAPAN IN 1911. 233 



may correspond to Leuciscus taczanowskii as described by Jordan and Fowler, no 

 distinction appearing. This very widely distributed and abundant species shows 

 slight differences in various localities, some of them perhaps being permanent dis- 

 tinctions. 



67. Ishikauia steenackeri (Sauvage). (Plate XL, fig. 2). 



Lake Biwaat Matsubara, No. 6321 many; Yodo River, at Osaka, Nos. 6271a-b, 

 Teeth 2, 4, 5-4, 4, 2. Scales 65. 



Family ANGUILLID^. 



68. Anguilla japonica Temminck & Schlegel. 

 Misaki, Nos. 6249a-d; Okayama, No. 6336a. 



Family SIMENCHELYID^. 



69. Simenchelys leptosomus Tanaka. 

 Izu (Owston Collection). 



A large specimen eighteen inches long, much larger than the types. The 

 pectoral is much larger, the eye smaller. The body is 1.33 not 1.66 times in the tail. 



Family LEPTOCEPHALIDiE. 



70. Leptocephalus myriaster (Brevoort) . 

 Osaka, Nos. 6324a-b. 



71. Leptocephalus nystromi Jordan & Snyder. 

 Misaki, No. 6105a; Osaka, No. 6090a. 



Fig. 7. Leptocephalus nystromi Jordan & Snyder. (From Proc. U. S. N. M., Vol. XXIII, p. 853). 



This may be L. heterognathus of Bleeker, but again that nominal species may 

 be the young of L. japonicus, which may in turn be the young of L. erebennus. 

 72. Leptocephalus riukiuanus Jordan & Snyder. 



One large example, No. 6288a, 61 cm. long. Head 1.875 in trunk; head and 

 trunk 2 in tail; maxillary 2.5 in head; lower jaw slightly shorter; snout 4; eye 7; 



Fig. 8. Leptocephalus riukiuanus Jordan & Snyder. (From Proc. U. S. N. M., Vol. XXIII, p. 852)_ 



