LAMPREYS AND FISHES OF INDIANA. 183 



. Genus MOXOSTOMA Raf. 

 RED-HORSES. 



Mouth inferior, the lower jaw horizontal, not split into two lobes, the 

 upper jaw protractile, not especially enlarged ; pharyngeal bones rather 

 weak, the teeth compressed, the lower five or six largest ; dorsal of 

 eleven to seventeen rays ; scales along the lateral line, forty to fifty-six. 



A genus of some twelve to fifteen species living east of the Rocky 

 Mountains. Of these the following belong to Indiana : 



ANALYSIS OF INDIANA SPECIES OF MOXOSTOMA. 



* Dorsal fin of fifteen to eighteen rays; upper lobe nf caudal longest. 



anisurum, p. 183. 

 ** Dorsal of from twelve to fourteen rays. 



t Lobes of caudal nearly equal, or upper shortest. 



X Head large, four to four and five-tenths in length ; mouth 



large. duquesnei, p. 184. 



XX Head short and small, four and five tenths to five in head; 



mouth small. aureolum, p. 185. 



tt Upper lobe of the caudal longest ; anterior ray of the dorsal a 



third or more longer than the base of the fin ; the upper 



border of the fin deeply concave. brevicejys, p. 185. 



MoXOSTOMA ANISURUM (RaF.). 



White-nosed Sucker. 



M. velatum, Jordan and Gilbert, 1882, 6", 138 ; 31. anisurum, Jordan, 

 1888, 7, 47; Smith, H. M., 1892, 4 pi. 25. 



Body deep and compressed, the depth in the length about three and 

 one-half, heavy in front of the dorsal ; the profile arched to the snout, 

 the latter projecting beyond the upper lip, its length in that of the head 

 a little more than twice; mouth inferior, of" medium size n-shaped, the 

 upper lip thin, the lower broad, flesby and plicate; head, in length, 

 three and three-fourths to four ; the space between the eyes flat ; dorsal 

 fin with fifteen to eighteen developed rays, the most anterior one reaching 

 back to the hindermost ; the free border of the fin straight; upper lobe 

 of the caudal longer and narrower than the lower ; anal I, 7, the free 

 edge rounded; scales, 6-44-5; color of upper parts light gray, of lower 

 white ; free border of dorsal fin dusky, also the central rays of the caudal, 

 lower fins white ; length about eighteen to twenty inches. 



Distributed from the Ohio River to British America. Dr. Jordan 

 says (4, '88, 162) that it is not rare at New Harmony, in Posey County. 



