CATOSTOMID^. 37 



Not usually a common species, though widely distributed. 

 Recorded by Kirtland, 1838 ; Hamilton County, Little Miami 

 .and tributaries, Henshall, 1888; Lorain County, " Rare, Ver- 

 million river and Beaver creek," McCormick, 1892 ; Maumee 

 river at Grand Rapids, St. Joseph river at Edgerton, Fish creek 

 at Edgerton, St. Mary's river at St. Mary's and Rockford, 

 Auglaize river at Wapakoneta and Cloverdale, Blanchard river at 

 Findlay, Kirsch, 1893 '■> Franklin County, Scioto river, Olentangy 

 .river, Black Lick, Little Walnut and Big Darby, Williamson and 

 Osburn, 1897 ; Stillwater creek near Dayton, and Wabash river 

 near Celina, R. C. Osburn, 1899. At the latter place, in a series 

 •of pools formed by the outlet of St. Mary's reservoir, the species 

 was taken in abundance, the only time I have ever taken more 

 than a few individuals in one locality. 



Genus: Moxostoma. 

 Key to Species. 



A. Dorsal fin of 15 to 18 rays ; lower lip V-shaped. — anisurum. 



AA. Dorsal fin of less than 15 rays ; lower lip truncate behind, not evidently V-shaped. 



B. Head rather large, 4 to nearly 5 in length, snout little projecting. — aureolum. 



BB. Head small and conic, about 5% in length, the snout much projecting beyond 

 the small mouth. — breviceps. 



Moxostoma anisurum (Rafinesque). White-nosed Sucker. 



Head short and broad, flattened above, 3% to 4X in length, eye midway 

 in head, 4 to 5 in its length. Body compressed ; back high, considerably 

 more arched than in M. aureolum ; depth 3^ in length. Fins all large. 

 Color bright olivaceous to smoky above, white or silvery on sides and belly. 

 Most easily distinguished from other species of the genus occurring in Ohio, 

 by the long dorsal fin, containing from 15 to 18 rays. 



This species is found in both the Lake and Ohio river drain- 

 -age, but is not usually very common, and is confined to the larger 

 streams. Ohio river, " as far as Pittsburg," Rafinesque. Given 

 by Jordan (Ohio Rept.) as three species— M. anisurum, of which 

 he says, " I have seen a few specimens, obtained in the Cincin- 

 nati market"; M. velatum, " frequently taken in the Ohio river 

 .and its tributaries," and M. carpio, from Lake Erie and the Ohio 

 at Cincinnati and Marietta. These three are now regarded as 

 .synonymous (See Bull. 47, U. S. Natl. Mus.). Hamilton County, 



