132 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY lY. 



a. Pharyngeal bones of moderate strength ; the upper teeth minute, the lower eu- 

 larged. {Chasmistcs.) 



146. C lioi'sas Jordan. —June Sucker of Utah Laic. 



Depth about 5 in length ; head 3|. Interorbital space broad, 2^ in 

 head. Eye G-7 in head. Width of the open month 3} in head. D. I, 

 11, the fin elevated in front, its anterior ray twice the height of the pos- 

 terior and about equal to the base of the fin ; A. I, 7 ; caudal deeply 

 forked, the lower lobe long ; lower fins small. Scales 9-63-8. Color 

 dusky above, pale below ; the scales of the back and sides profusely cov- 

 ered with dark punctulations. L. 18 inches. Utah Lake; abundant. 



(Jordan, Bull. U. S. Nat. Mu8.xii,219, 1878.) 

 aa. "Pharyngeal bones very thin and flat, with very numerous minute teeth, as in 

 Carpiodcs." {Lipomyzon Cope.*) 



I'lY. C l!>revin'(»slras Cope. 



" Shorter than C. luxafus, especially the muzzle, and the latter is with- 

 out the hump produced by the protuberant i^remaxillary spines. Parie- 

 tal fontanelle small. The lower lip fold is only present on the sides of 

 the mandible. Body nearly cylindric. Scales 12-74-11. Eadii : D. 11 ; 

 A. 9. Color dusky above, silvery below J fins colorless." {Cope.) L. IG 

 inches. Klamath Lake, Oregon. 



(Cope, American Naturalist, 1879,785.) 



14§. C lusatus Cope. 



'■'■ Form elongate. Head long, flat above, and with a large fontanelle. 

 Mouth terminal, the spines of the premaxillary projecting so as to form 

 a hump on the top of the snout. Lower lip a very thin dermal fold, ex- 

 tending entirely around the chin. Scales 12-S0-9. Radii : D. 11 ; A. 9. 

 Color clouded above, with black punctulations, below paler, with red 

 shades in some specimens ; fins uncolored." {Cope.) L. 3 feet. Kla- 

 math Lake and Eiver. 



(Cope, American Naturalist, 1879,784.) 



66.— EKIMY^OW Jordan. 

 Chiib Suckers. 



{MoxoKioma Kg. ; not of Eaf.) 



(Jordan, Bull. Buffalo Soc. Nat. Hist. 187(5, 95 : type Cyprinns ohlonrjus Mitch.- = 

 Cyprinus sncetta Lac.) 



Body oblong, rather shortened, heavy forwards, and considerably 



compressed. Head moderate, rather broad above. Mouth moderate, 



*Coj)e, Amei'. Nat. Jan. 1881, 59: type Chasm'istes hrcvirostris Cope. {Xcirtco, to be 

 deficient ;. /<^Cg^> to suck.) 



