10 



CATOSTOMUS ALTICOLUS, sp. nov. 



A stout, rather short species of sucker, with elongate head and narrowed 

 muzzle. The scales are larger behind than anteriorly, and number sixty 

 transverse, and nineteen longitudinal rows. The radial formula is, 

 D. 10 ; C. 18 ; A. 7 ; V. 10, originating below the middle of the dorsal 

 fin, and neither extending to the vent nor reached by the pectoral fin. 

 Caudal with shallow emargination. The depth enters the length with 

 caudal five times, which is three and two-thirds the length of the head, 

 Orbit 4.33 times in head, 1.66 times in interorbital width. The muzzle 

 is long (1.66 times orbit), but is not produced much beyond the mouth, 

 but is truncate and narrowed viewed from above . Lip-folds well developed ; 

 the superior pendant, the inferior full but incised to the symphysis, the 

 surfaces tubercular. Vertex flat. 



Total length M., .0863 ; ditto to origin caudal fin, .070 ; ditto to origin 

 anal, .0546 ; ditto to origin of dorsal, 0365 ; width head at posterior 

 nares, .008 ; ditto at middle of pterotics, .010 ; color silvery, upper part 

 of sides and back dusky. In specimens of this size the lateral line is in- 

 visible, but in adults of eight inches obtained by my friend, J. S. Lip- 

 pincott, it extends to the basis of the caudle fin. 



Numerous specimens from Twin Lake, Colorado, obtained by Dr. J. T, 

 Rothrook, botanist of the survey. This lake is situated in the South 

 Park, at an elevation of 9,500 feet above the sea (no. 120). 

 CATOSTOMUS DISCOBOLUS, Cope. 



(Hayden's Annual Report, U. 8. Geological Survey, 1870, p. 435). 



Numerous specimens from the Zuni River, Arizona, and from another 

 not specified locality in Arizona, (No. 504), obtained by Messrs. Henshaw 

 and Newberry. 



HAPLOCHILUS FLORIPJNNIS, sp. nov. 



First dorsal ray standing above the second or third anal ; formula, D. 

 1011 ; A. 1314; V. 7. Scales large in ten longitudinal and 29 trans- 

 verse series. First dorsal ray half as far from base of caudal as from 

 end of muzzle. Length of head 4.66 times in total, a little less than 4 

 times to basis of caudal fin. Orbit large, 3.2 times in length of head and 

 1.6 times in interorbital width. Mandible projecting a little beyond pre- 

 maxillary ; one external series of teeth in both jaws larger than the 

 others. 



Total length M. .0595 ; do. to anal fin .0335 ; do. to basis of ventral fin 

 .027 ; do. of head .0138 ; width of head at pterotics .008. Color olive 

 gray, the scales with ochre borders. Fins yellow, broadly edged with 

 crimson. 



Numerous specimens from the Platte River, near Denver, Colorado, 

 No. 65. A species with large scales. 



URANIDEA WHEELERI, sp. nov. 



The only Physoclystous or spinous rayed fish as yet found in the Great 

 Basin of Utah. 



