64 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY—II. 
46. NOCOMIS MILNERI, sp. nov. 
Form somewhat of Semotilus corporalis, but more terete and elongate; 
depth 44 in length. Head about the same, flattish above, with a broad 
snout, which projects over the large, oblique mouth; barbel very ap- 
parent. Eye large, equal to snout, 33 in head, 14 in interorbital space; 
dorsal beginning over last rays of ventrals, I, 8; anal I, 8. 
Scales quite small, crowded forward, asin Semotilus corporalis, 11-68-7, 
or thereabouts. 
Colors of Semotilus corporalis, but the fins unspotted; a faint black 
band passing around snout through eye, somewhat silvery below. 
Teeth 2, 4-4, 2, without grinding surface; length 4 to 6 inches, 
Types, No. 130, United States National Museum. Collected in Lake 
Superior, by J. W. Milner, of the United States Fish Commission, for 
whom the species is named. 
This species may be known from JN. prosthemius Cope by the larger 
scales and different mouth. Specimens of the latter are in the National 
Museum, from Evanston, Ill. Gobio plumbeus Ag., I do not know; the 
present species appears to be different. 
47. CLIOLA ARIOMMA, (Cope) Jordan. 
Photogenis ariommus, Cope, Trans. Am. Phila. Soe. 1866, 378. 
This species is a true Cliola as I have defined that genus. The col- 
ored species referred by Prof. Cope and myself to Episema, viz, EL. calli- 
sema and EH. pyrrhomelas, are to be placed in Photogenis as defined in 
this paper. Their natural affinities are entirely with the latter group. 
48. HYBOGNATHUS REGIUS, Girard. 
Proc. Acad. Nat. Sci. Phila. 1856, 209. 
This specigs, which has been for some time wrongly referred to Hy- 
bopsis, is a true Hybognathus, having the long intestines and cultriform 
pharyngeal teeth characteristic of the former genus. This fact was 
pointed ont to me by Dr. T. H. Bean, who is now doing some very 
useful work in the way of verification of ascribed characters. Hybo- 
gnathus osmerinus Cope is, so far as I can see on comparison of typical 
specimens, identical with H. argyritis Grd. H. regius is larger and 
deeper-bodied ; H. nuchalis smaller. . 
