1885.] NATURAL SCIENCES OF PHILADELPHIA. 63 



A REVIEW OF THE SPECIES OF THE GENUS PIMEPHALES. 

 BY WILLIS S. BLATCHLEY. 



I have examined numerous specimens of Pimephales and 

 Hyborhynchus from various parts of the United States, with a 

 view to discrimination of the species. 



The genus Hyborhynchus is evidently unworthy of retention, 

 and the entire group is, in my opinion, composed of but two 

 species, Pimephales promelas and Pimephales notatus. 



I give the synonymy of each and an analytical key giving the 

 principal characters by which they may be separated. 



The specimens examined belong to the Museum of the Indiana 

 University. 



a. Body comparatively short and deep, the greatest depth about 



4 times in length of body ; head short, convex, almost as 



broad as long in the adult, its length 4 in body ; mouth 



slightly oblique ; lateral line of various lengths, sometimes 



wanting on twenty or more scales ; sometimes complete 



(variety confertus) ; origin of dorsal midway between 



pupil and base of caudal ; ventrals reaching to or beyond 



first ray of anal ; head, dorsal and pectoral fins of breeding 



males jet black, the snout with a few moderate-sized 



tubercles ; scales 8-47-6. Promelas. 1. 



aa. Body elongate, rather slender, the greatest depth about 4f 



times in length of body ; head comparatively long, its 



length 4i in body, its surface much depressed above and 



descending abruptly in front of nostrils ; mouth horizontal; 



lateral line complete ; origin of dorsal midway between 



snout and base of caudal ; ventrals not reaching vent ; 



males in spring with 16 large nuptial tubercles, often 



accompanied by a small protuberance of skin, resembling 



a barbel, at angle of mouth ; scales 6-44-4. Notatus. 2. 



1. Pimephales promelas Raf. 



Pimephales promelas Rafinesque, Ichth. Oh., 1820, 53 (Lexington, 

 Ky.); Kirtland, Rept. Zool. Ohio, 1838, 194; Kirtland, Bost. Jour. 

 Nat. Hist., iii, J838, 475 ; Storer, Synopsis, 1846, 418 ; Agassiz, 

 Amer. Jour. Sci. Arts, 1855, 220 ; Putnam, Bull. M. C. Z., 1863, 8 ; 

 Giinther, Cat. Fish. Brit. Mus., vii, 1868, 181 ; Jordan, Ind. Geol. 

 Surv., 1874, 224; Jordan, Bull. Buff. Soc. Nat. Hist., 1876, 94; 



