178 Bulletin 47, United States National Museum. 



286. CATOSTOMUS OCCIDENTALS, Ayres. 

 (SAOEAMENTO SUCKER.) 



Body rather slender, little elevated. Mouth comparatively smuii, 

 smaller than in C. commersonii; the upper lip with 5 or 6 rows of smallish 

 papillae ; lips rather thin. Head quite small, rounded above, 4 in length, 

 the profile steeper than in C. commersonii; the snout more pointed, the 

 two sides of the head more convergent forward. Eye small. Dorsal fin 

 longer than high, its rays 12 to 14; caudal well forked, the upper lobe the 

 longer. Scale 13-75-10, 40 before dorsal. Dark above, gradually paler 

 below. Streams of California ; abundant in the Sacramento and San 

 Joaquin rivers, (occidentalis, western.) 



Catostomiis occidentalis, AYBES, Proc. Cal. Ac. Sci., 1854, 18, San Francisco ; AOASSIZ, Am. Jour. 

 Sci. Arts, 1855, 209, San Francisco ; JOBDAN, 1. c., 172, 1878 ; GUNTHEB, Cat., vn, 17, 1868 ; 

 JOBDAN & GILBEBT, Synopsis, 128, 1883. 



287. CATOSTOMUS BERNAEDINI, Girard. 



Closely allied to C. occidentalis, but with the head less conic and the 

 lower fins larger. Scales much crowded forward, 31 before dorsal, 75*in 

 lateral line ; fontanelle large ; lips broad, without sheath, formed as in 

 C. occidentalis, the lower deeply incised ; fins high, the dorsal longer than 

 high, with 12 rays ; caudal lobes equal ; head 4fr in length. San Bernar- 

 dino Creek, a tributary of Rio Yaqui, on the boundary of Arizona and 

 Sonora. 



Catostomus bernardini, GIBARD, Proc. Ac. Nat. Sci. Phila., 1856, 175, San Bernardino Creek; 

 JOBDAN & GILBERT, Synopsis, 128, 1883; JOBDAN, Cat., 18, 1885. (Type, No. 174.) 



288. CATOSTOMUS MACBOCHEILUS, Girard. 

 (COLUMBIA RIVEB SUCKER.) 



Head 4 in length, depth 5. Scales 12-72 to 75-10, 40 before dorsal. Body 

 heavy forward ; snout blunt, much overlapping the horizontal mouth; 

 mouth quite large, with very large lips, the upper full and pendant, with 

 6 to 8 rows of moderate papilla*. Head large, 4J in length, rather narrow, 

 quadrangular, the snout projecting. Eye large, 6 in head. Dorsal fin 

 much longer than high, its rays about 15; pectorals long and narrow; 

 caudal well forked. Coloration rather dark; a dusky lateral stripe ; below 

 abruptly pale. Columbia River as far as Flathead Lake, Montana ; not 

 rare, (paupbc, large ; ^eiAo?, lip.) 



Catostonms macrocheilus, GIEABD, Proc. Ac. Nat. Sci. Phila., 1856, 175, Astoria, Oregon ; JORDAN, 

 1. c., 171,1878; JOBDAN & GILBEBT, Synopsis, 128,1883; EVERMANN, Bull. U. S. Fish Com., 

 1891, (1892), 40, plate 18, fig. 2. (Type, No. 240.) 



289. CATOSTOMUS COMMERSONII, (Lacepede). 

 (COMMON SUCKER; WUITE SUCKEB; BROOK SUCKER; FINE-SCALED SUCKER.) 



Body moderately stout, varying with age, subterete, heavy at the 

 shoulders, the depth 4 to 4f in length. Head rather large and stout, 

 conical, flattish above, its length 4 to 4in body (3 to 4 in young). Snout 

 moderately prominent, scarcely overpassing the mouth. Mouth rather 

 large j the lips strongly papillose, the upper moderate, with 2 or 3 rows 



