132 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



a. rharyiii, f eul l.mies of iiiddc ratr strength; the Tipper teeth minute, the lower en- 

 larged. (r/i.vii-s/< v.) 



I S6. C 1 . lioi'US .Ionian. Jttin- Sucker of Utah Lake. 



Depth about ." in length; head .">-. Interorbital space broad, 2 in 

 head. Kye (i-7 in head. Width of the Open mouth 3 J in head. D.I, 

 11, the tin elevated ill front, its anterior ray twice the height of the pos- 

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

 forked, the lower lobe long; lower fins small. Scales 0-G3-8. Color 

 dusky aliovc, 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. "' rharyni;eal hones very thin and flat, with very numerous minute teeth, as in 

 < 'iirjiindr.f.' 1 (Lipomyzon Cope.*) 



14 7. C. brevirostris Cope. 



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

 out the hump produced by the protuberant premaxillary 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. 0. Color dusky above, silvery below; fins colorless." (Cope,} L. 1G 

 inches. Klamath Lake, Oregon. 



(Cope, American Naturalist, 1879,785.) 



148. C. Itixatus 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 hum]) on the top of the snout. Lower lip a very thin dermal fold, ex- 

 tending entirely around the chin. Scales I2-SO-!). Uadii : D. 11 ; A. 0. 

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

 shades in some specimens ; tins uucolored." (Cope.} L. 3 feet. Kla- 

 math Lake and K'iver. 



(Cope, Am. riean Naturalist. H79.784.) 



60. EBfiUIYEON J.ml:m. 



(Mnrnxtoma A".; not <>!' 1,'af.) 



!an. Hull. P,ullal'> Boc. \at. Hist. I-?.;, '.if.: type ('i/j,ri>iH a!,!,,,,,/!/* Mitch. = 

 ' riiniH xnrillii I.. -i. . 



I'.ody ohlon.u, rather shortened, heavy forwards, and considerably 

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



"I '"I"'. -^"' ' ' in- 1--I. '*: type r/,,(v;/M's/rs brcriroylri* ( 'npe. (leiiroo, to be 



drlieiel,; ' siiek. ) 



