30. CATOSTOMID^ — CATOSTOMUS. 129 



longer than the last rays ; pectorals and ventrals short ; caudal short ; 

 anal long. Pharyngeal bones rather weak, with smallish teeth. Black- 

 ish above ; males with the sides rosy; fins dark. Uead3g; depth 4A. 

 D. 13 ; A. 7 ; scales 9-G5-0. L. 18 inches. Utah Lake. 



(Jonliiii & (".ilbcrt, Proc. U. S. Nat. Mns. iii, 4G1, 1880.) 



110. C fecuatdlis Cope A- Yarrow. — Utah Lake Suclcer. 



JJody moderately stout, little compressed, the tail slender. Head sub- 

 conic, the i)rofile regularly decurved from the nape to the base of the 

 premaxillary spines, which abruptlj^ protrude, forming a distinct "nose" 

 as in Clmsmistes lionis ; premaxillaries in front scarcely below the pre- 

 orbital. ]\randible large, oblique, placed at an angle of 30° when the 

 mouth is closed, its length 3 in head. Upper lip full, pendent, with 

 about 4 rows of coarse papillae ; lower lip moderate, divided by a broad 

 notch, each lobe with about G rows of papilliTe. Eye a little behind 

 middle of head. First ray of dorsal twice height of the last, its length 

 greater than that of the base of the fin ; caudal forked, the lower lobe 

 longest; pectorals long; anal high. Dusky above, pale below. Head 

 4; depth 4.}. D. 11; A. 7 ; V. 9; scales S-GO-8. L. 13 inches. Utah 

 Lake ; excessively abundant. This species has evident aflSuities with 

 Chasmistes. 



(Cope «fe Yarrow, Zool. Wheeler's Expl. W. lOOtliMcr. v, GTS, 1870; Jordan & Gil- 

 bert, Proc. U. S. Nat. Mus. 1880, 4G3. ) 



cr. Upper lip comparatively thin, with but few (2 or 3) rows of papilhe. 

 /. Scales much reduced, and crowded anteriorly ; dorsal rays 11-15. 



141. C cypSio Lockiiig'toTi. 



A conspicu(jiis hump behind the occiput, supported by a greatly ex- 

 panded, broadly triang-ular interneural bone. Upper lii^ with about 3 

 rows of papilloe, lower lip with about 8 ; the lower lip divided to the 

 base by a broad emargination. D. 15; A. 8; V. 10; Lat. 1. 72. Colo- 

 rado liiver at mouth of Gila. {LocldiKjion.) 



(Lockington, Pror. Acad. Nat. Sci. Phila. 1880.) 



112. C coilimersoni (Laodpedo) Jordai). — Common Suclcer ; White Suclcer; Brook 

 Suclcer; Fhic-sealcd Sucker. 



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

 shoulders, the depth 4-4!} in length. Head rather large and stout, 

 conical, flatfish above, its length 4-lA in body (3i-4| in young). 

 Snout moderately prominent, scarcely overpassing the moiith. Mouth 

 rather large ; the lips strongly papillose, the upper moderate, with 2 or 3 

 rows of i)apilhe. Scales crowded anteriorly, mnch larger on the sides 

 than below ; scales 10-(M to 70-9. Coloration olivaceous ; males in 

 Bull. Nat. Mus. No. IG 9 



