64 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY II. 



46. NOCOMIS MILNERI, sp. nov. 



Form somewhat of Semotilus corporalis, but more terete and elongate j 

 depth 4i 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, 3f in head, IJ in interorbital space; 

 dorsal beginning over last rays of ventrals, 1,-8; anal I, 8. 



Scales quite small, crowded forward, asin Semotilus corporalis, 11-68-7, 

 or thereabouts. 



Colors of Semotilus corporaUs, 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, Ko. 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 N. prostliemius Cope by the larger 

 scales and difi'erent mouth. Specimens of the latter are in the National 

 Museum, from Evanston, 111. GoMo plumheus Ag., I do not know; the 

 j)resent species appears to be different. 



47. CLIOLA ARIOMMA, {Cope) Jordan. 



Photogenis ariommus, Copo, Traus. Am. Phila. Soc. 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 Upisema, viz, E. colli- 

 sema and E. pyrrJiotnelas, 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. 1656, 209. 



This species, which has been for some time wrongly referred to Hy- 

 bopsis, is a true Ryhognathus, having the long intestines and cultriform 

 pharyngeal teeth characteristic of the former genus. This fact was 

 pointed out to me by Dr. T. H. Bean, who is now doing some very 

 useful work in the way of verification of ascribed characters. Hyho- 

 gnathus osmerinus Cope is, so far as I can see on comparison of typical 

 specimens, identical with H. argyritis Grd. E. regius is larger and 

 deeper-bodied ; H. nuclialis smaller. 



