FISHES OF NEW YORK 109 



not much esteemed as a food fish, though it is sold in large 

 numbers. 



Minytrema melanops is normally without a lateral 

 line, but this feature is occasionally partially developed and has 

 caused some confusion in assigning certain individuals, to their 

 proper genus; indeed, one author has described and figured the 

 striped sucker as two species, belonging to two different genera, 

 having been misled by this undeveloped character. 



Genus MOXOSTOMA Rafmesque 



Body moderately elongate, sometimes nearly round, usually 

 compressed; scales large, nearly uniform in size; lateral line com- 

 plete, straight or anteriorly curved; head varying in length, sub- 

 conical; eye usually rather large, placed moderately high; sub- 

 orbital bones very narrow; fontanelle- well developed; mouth 

 varying much in size, inferior, the mandible horizontal or nearly 

 so; lips unusually well developed, the form of the lower varying, 

 usually with a slight median fissure, but never deeply incised;, 

 lips with transverse folds which are rarely broken up to form 

 papillae; jaws without cartilaginous sheath; muciferous system 

 well developed; opercular bones moderately developed, nearly 

 smooth; isthmus broad; gill rakers weak, moderately long^ 

 pharyngeal bones rather weak, the teeth rather coarser than in 

 E r i in y z o n and Catostomus, strongly compressed, the 

 lower five or six stronger than the others, which rapidly dimin- 

 ish in size upward, each with a prominent internal cusp; dorsal 

 fin nearly median, moderately long; anal fin short and high, with 

 seven developed rays; caudal fin deeply forked; air bladder with 

 three chambers. (After Jordan and Evermann) 



62 Moxostoma anisurum (Rafinesque) 

 White-nosed Sucker 



Catostomus anisurus RAFIXESQFE. Ichth. Ohien. 54, 1820; KIRTLAND, Bost.. 



Jour. Nat. Hist. V, 269, pi. 20, fig. 2, 1845; STOKER, Syn. Fish. N. A. 



172, 1846. 



Catostomus carp to GUNTHER, Cat Fish. Brit. Mus. VII, 20, 1868. 

 Myxostoma anisura JORDAN, Man. Vert. ed. 2, 315, 1878; Bull. 12, U. S. Nat. 



Mus. 126, 1878. 



