Jordan'-Thompson : Notes on a Collection of Fishes. 87 



Specimens from Lake Erie show: 



B. 15. D. IV, 18. x^. Ill, 15. P. 14. V, II. Scales 118. Head3>^X. 

 Eye 3 in snout, 7 in head. Brownish vertical suborbital band less distinct. 

 Maxillary of same relative length, but extending a very little farther back. 



Family PERCID.E. 

 9. Perca fluviatilis (Linnaeus). 

 Many specimens, not evidently different from the Common Perch of 

 Europe, with which the Russian authors identify the species. 



Family COTTID^. 



10. Cottus kneri (Dybowski). 



Coitus kneri Dybowski, Verh. Ges. Wien, XXIV, 1874, 385 (Lake Baikal). 

 Thirteen specimens, agreeing well with Dybowski's account. 



11. Cottus sibiricus (Kessler). 



Coiim sibiricus Kessler, Warpachowski, Ann. Mus. Petersburg, 1897, 249, 



tab. XI, fig. 6. 

 Cottus haiiej Dybowski, Verh. Ges. Wien, XIX, 1869, 949, tab. XIV, fig. 2 



(Amur Basin). 



One specimen, 87 in. long, referred with some doubt to this species 

 (Onon, Ingda, Amur). 



Head 3 in body, without caudal; depth at operculum 6; eye 5 in head, 

 i^ in interorbital space. P. 7 — 17. A. 12. V. 1,4. P. I5- 



Body flattened, greatly at the head, but cylindrical at the anus. Skin 

 smooth except above the lateral line, on the flanks, where it is thickly 

 beset with small spicules. The maxillary extends to below the anterior 

 margin of the eye-orbit. Four spines are present on the opercular bones, 



