189 



principles of nomenclature had transferred the name of Cottus to 

 the marine species, I should not have created a new one for the 

 fresh water species. I should have adopted the genus Uranidea 

 although unfortunately chosen, knowing how small a number of 

 names have a true etymological signification, and how many are 

 arbitrarily applied. There are in North America : — 



CoTTUs coGNATUs Richards. Faun. Bor. Amer. in. 1836, p. 40. 



Great Bear Lake ; Sir John Richardson. 

 CoTTUS RicHARDSoiMii Agass. Lake Superior, 1850, p. 300. 



Northern shores of Lake Superior ; Prof. Agassiz. 

 CoTTUs Bairdii Grd. — Coitus gohio Kirtl. Bost. Journ. Nat. 



Hist. V. 1847, p. 342. — Body subcylindrical, short, mouth 



comparatively large. — Pennsylvania, tributaries of the 



Ohio ; Prof. Baird. — Mahoning River ; J. P. Kiriland. 

 Cottus meridionalis Grd. Resembles the former, but the tail 



tapers away more suddenly. The mouth is also a little 



larger. — James River ; Prof. Baird. 

 Cottus gracilis Heck. Ann. des Wien. Mus. ii. 1837, p. 148. 



— Uranidea quiescens DeKay, New York Fauna, 1842, 



p. 61, PL V. fig. 14. — Cottus gohio Ayres, Bost. Journ. 



Nat. Hist. V. 1845, p. 121, PI. xi.— New York; Heckel, 



DeKay. — Manchester, Connecticut, W. O. Ayres. 

 Cottus viscosus Hald. Suppl to a Monogr. of Limn. &c. 1840, 



p. 3. 



Eastern Pennsylvania ; Professors Haldeman and Baird. 

 Cottus boleoides Grd. Remarkable for its slender body and 



its largely developed fins. 



Windsor, Vt. ; Ed. C. Cabot, Dr. Storer. 

 Cottus Franklinii Agass. Lake Superior, 1850, p. 303. 



Eastern and Southern shores of Lake Superior; Prof. 



Agassiz. 

 Cottus gobioides Grd. Body thick and short ; mouth very 



large. — Burlington, Vt. ; Rev. Z. Thompson, Dr. D. H. 

 Storer. 

 Cottus Fabricii Grd. — Cottus gohio Fabr. Faun. Grosnl. 1780, 

 p. 159. — Greenland ; O. Fabricius. 



There remains one species which cannot be placed in any of 

 the preceding genera, it is the C. asper Rich, from Columbia 



