139 * Ayres on the identity of 
We come now to speak of the Cottus viscosus of Mr. Halde- 
man and Uranidea quiescens of Dr. De Kay. Of these, how- 
ever, our notice may be brief, for we are fortunately in pos- 
session of the means of determining at once to what they 
refer. Iwill copy the account given by Mr. Haldeman, and 
endeavor to show that the description contains gps which 
may prevent its referring to the same species. 
It was published in a pamphies; containing other descrip- 
-nn and i is as follows. 
OTTUS ViSCOSUS. Body very slender, yellowish cloud- 
pm black, the first dorsal fin edged with a very nar- 
row line of orange. The fin rays are, D. 7 —17; P. 14; 
V.3; A. 12; C. 13, of which 11 are long. "Total length, — 
3 inches. Snout to first dorsal ray, 0.84, and from here to 
the last dorsal ray, 1.5. The anus is midway between the 
snout and base of the caudal rays. "The lateral line is straight 
from the middle of the first dorsal fin backward. Hab. — 
ern Pennsylvania. 
Obs. “ae resembles C. gobio, but the proportions are 
d 
"This is m whole description. It is scüircel sufficient to 
enable us to determine to what jit refers, but so far as it goes; 
it agrees with our fish, and, as I believe, with gobio. Mr 
Haldeman says it differs from this latter species in its propor- 4 
tions, but if so, they must be proportions which he has not 
mentioned here, for these correspond most perfectly. 
There is but one thing more to be considered, the species 
described by Dr. De Kay. He has attempted to’ establish # 
new genus, but I cannot see that it is needed. 
In Cottus, taking the description which Dr. De Kay has 
Li himself given, we have the “ Head large, depressed. Body 
without scales. Dorsals distinct, or slightly connected. Ven 
— trals under the pectorals, and with three or four rays. ; 
de, or preopercle, armed with spines, occasionally both. 
Tee h velvet like, on the jaws and anterior part of the 
vomer. Here we have every character of Uranidea, except — 
