176 Bulletin 47, United States National Museum. 



about 96 (90 to 108 in 8 examples counted), very much reduced in size and 

 crowded anteriorly, about 46 before the dorsal. Lateral line imperfect, 

 often undeveloped for as much as \ its length. 



Body moderately slender ; head heavy ; snout not very pointed; eye 

 rather large, high up, middle of pupil a little nearer posterior edge of 

 opercle than tip of snout. Upper lip thick and narrow, but not i)endant, 

 3 rows of papilla} ; lower lip incised to base, the two lobes short and 

 rounded, with about 6 rows of strong papilke. Cartilaginous sheath of 

 jaws not much developed. Origin of dorsal about midway between tip of 

 snout and base of middle caudal rays; greatest height of dorsal fin If 

 in head, its free edge straight. Anal fin pointed, its height usually greater 

 than that of dorsal, reaching base of caudal, \\ in head; pectorals about 

 equal to anal in length ; ventrals shorter, 1| in head. Least depth of 

 caudal peduncle 2* to 3 in head. Peritoneum pale, with dark punctula- 

 tions. Air bladder large. This species is related to C (jriseus (Girard), 

 from which it may be distinguished by its heavier headj larger eye, rather 

 narrower mouth, shorter lobes of lower Yip, and the less development of 

 the cartilaginous sheaths of the jaws. L. 8 inches. Snake Kiver basin; 

 the types from near Pocatello, Idaho. 



Culoalomiis pocatello, Gilbert & Evermann, Bull. U. S. Fish Com., 1894, 150, witli plate, Ross 

 Fork of Snake River, near Pocatello, Idaho. (Type, No. 45385.) 



282. CATOSTOMUS CATOSTOMUS, (Forster). 

 (Long-nosed Sucker; Northern Sucker; Red Sucker.) 



Body elongate, subterete, the depth 4 J to 41 in length. Head quite 

 long and slender, 4J to 4f in length, depressed and flattened above, broad 

 at base, but tapering into a long snout, which considerably overhangs the 

 large mouth. Lips thick, coarsely tuberculate, the upper lip narrow, 

 with 2 or 3, rarely 4, rows of tubercles; lower lip deeply incised, the lobes 

 shorter than in C. grwens, and the mouth narrower. Lower jaw w' ith a 

 slight cartilaginous sheath. Eye rather small, behind the middle of the 

 head. Scales very small, much crowded forward, 95 to 114 in the lateral 

 line, and about 29 (26 to 31) in a crossrow from dorsal to ventrals. Dorsal 

 rays 10 to 11. Males in spring with the head and anal fin profusely tuber- 

 culate, the tubercles on the head small ; the sides at that season with a 

 broad rosy band. Size large. L. 2^ feet. Great Lakes, upper Missouri 

 Kiver, upper Columbia, and northwestward to Alaska ; very abundant 

 northward, but not coming south of lat. 40°. The most widely distributed 

 species, (/crirw, below ; trrw^ft, mouth.) 



Cyprimis catoslomns, Forster, Phil. Trans., 1773, 155, Streams about Hudson Bay. 

 Calostomn.ilon'jirostrum, a,nd }iuilsonini>, titter 'FoTStoTjhT^ SvEVR, Joixi: Ac. Nat. Sci. Phila., 1817, 



102, 107, Vermont. 

 CcUoslomus forslerianus, Richardson, Franklin's Journal, 1823, 720, Lake Huron: Great Slave 



Lake. 

 Catostomns aurora, Agassiz, Lake Superior, 300, 1850, Lake Superior. 

 Catoslomm hutlsonius, Guntiieu, Cat., vii, 13,1808; Jordan, I. <■., 175,1878. 

 Oatoslomus longiroslris, Jordan A GiLUEiir, Synopsis, 126,1883. 



