190 Bulletin 4.7, United States National Museum. 



305. MOXOSTOMA ANISURUM, (Bafinoaque). 

 (WHITE-NOSED SUCKER.) 



Body stout, deep, compressed, the back elevated, the depth 3 to 4 in 

 length. Head short, heavy, flattish arid broad above, 3| to 4 in length; 

 depth of cheeks i length of head. Eye rather large, midway in head, 4 to 

 5 in its length. Muzzle rather prominent, bluntish, overhanging the 

 rather large mouth; upper lip thin, lower strongly Y-shaped; fins very 

 large. Dorsal long and high, its height & the length of head, its free border 

 straight, the first ray about as long as fin. Pectorals nearly reaching 

 ventrals; upper lobe of caudal narrow, longer than lower. D. 15 to 18. 

 Color very pale and silvery; smoky above; lower fins white or pale red. 

 Size large. Ohio River and Great Lake region ; not very common, but 

 widely distributed, (avtaos, unequal; ovpd tail.) 



Catostomus anisurus t RAFINESQUE, Ichth. Oh., 54, 1820, Ohio River. 



Catostomns carpio, CUVIER & VALENCIENNES, xvu, 457, 1844, Lake Ontario, not of Rafiuesque. 



CatostomMs carpio, GUNTHER, Cat., vn, 20,1868. 



Moxostoma carpio, JORDAN & GILBERT, Synopsis, 139, 1883. 



Ptychostomus velalus, COPE, Proc. Am. Phil. Soc. Phila., 1870, 471, Youghiogheny River, 



Pennsylvania. 



Moxosloma velalum, JORDAN & GILBERT, Synopsis, 138, 1883. 



Moxostoma valenciennesi, JORDAN, Proc. U. S. Nat. Mus., 1885, 73, substitute for carpio, preoccupied. 

 Moxosloma anisurum, JORDAN, Man. Vert., Ed. 5, 47,1890. 



306. MOXOSTOMA COLLAPSUM, (Cope). 



Head 4; depth 3. D. 15. Scales 6-42-5. Body rather stout, compressed, 

 the back elevated. Head short, small, conic, broad and flat above. Mouth 

 small, the lips plicate, the lower lip yy-shaped. Muzzle truncate, over- 

 hanging the mouth. Eye in middle of side of head, 4 in its length (in 

 specimen of 8 inches), -J in snout, 1| in interorbital. Depth of cheek, 

 - length of head back to preopercle. Dorsal long, its free edge straight, 

 its first ray as long as its base, f length of head. Caudal lobes subequal. 

 Silvery, dusky above, without dark spots on bases of scales ; dorsal and 

 caudal membranes blackish; other fins plain, said to be orange in life. 

 (H. M. Smith.) Lowland streams of North Carolina (Neuse, Catawba, 

 Yadkin, and Roanoke) ; said to be very abundant. Apparently very close 

 to M. anisurum, but with the mouth smaller ; perhaps not distinct, (col- 

 lapsus, flattened sidewise.) 



Ptychostomns collapsus, COPE, Proc. Am. Phil. Soc., 1870, 471, Neuse, Yadkin, and Catawba 



rivers, North Carolina. 

 Moxosloma collapsum, SMITH, Bull. U. S. Fish Com., 1891, 198. 



307. MOXOSTOMA BUCCO, (Cope). 



Head short and very wide through the opercles ; front and vertex flat. 

 Body stout, the back somewhat elevated ; depth 4 in length. Muzzle sub- 

 truncate, slightly projecting. Lips thin, the lower with lateral lobes 

 inclosing a ^-shaped interval. Eye large, 3i in head, width of head behind 

 orbits If in its length. Scales 6-40-5. D. 12 ; A. 7 ; V. 9. Olivaceous, 



