and their diameter enters their frontal interspace 1.66 times, and the 

 length of the head 4.6 times, twice in the length of the muzzle in front 

 of its border. The muzzle considerably overhangs the mouth. The lip 

 folds are tubercular and largely developed, forming a discoidal funnel. 

 The posterior is deeply incised behind ; and there is a notch where it 

 joins the anterior lip. The commisure is transverse and abruptly angu- 

 late to the canthus, and covered witla a cartilaginous sheath as in Chon- 

 drostoma. Isthmus very wide. 



Total length M. 0.168 ; do. to basis caudal .149 ; do. to basis ventral 

 .082; do. to basis of dorsal .070 ; do. of head .029 ; width of muzzle 

 at mouth .0115 ; with head at pterotics .0156. Color blackish, belly and 

 ventral fins yellowish (? pink). This species resembles the Catostomus 

 discobolus, Cope, but has larger scales, besides presenting generic differ- 

 ences. Several specimens from near Provo. Messrs. Yarrow and Hen- 

 shaw. 



MINOMFJS JARROVir, sp. nov. 



A less elongate species than the last, with a much less enlarged muzzle. 

 The anterior scales are smaller than the posterior, and the first dorsal ray 

 is nearly intermediate between the end of the muzzle and the basis of 

 the caudal fin. Radii D. 9 ; C. 18 ; A. I. 7 ; V. 9, well removed from 

 both vent and pectoral fin. Depth at dorsal fin 5.75 times in total length, 

 into which the length of the head enters 5.3 times ; orbit small, 4,6 times 

 in length of head ; twice in interorbital width, and 1.75 times in muzzle, 

 the latter projecting a little beyond mouth, not depressed, but nar- 

 rowed viewed from above. Labial folds well developed, tubercular, the 

 anterior rather narrow, the posterior deeply incised. Commissure with 

 acute cartilaginous edge, regularly convex forwards. 



Scales |i 



Total length M. .107 ; do. to basis of caudal .0933 ; do. to basis ven- 

 tral .052 ; do. to basis dorsal .047 ; do, of head .0205 ; width muzzle at 

 mouth .075 ; of head at pterotics .011. 



Color light brown with numerous dusky spots and clouds ; a narrow 

 abdominal band light ; fins and chin ? red. 



Two specimens (204a) obtained by Messrs. Yarrow and Henshaw at 

 Provo. Dedicated to Dr. Yarrow, whose zoological explorations in vari- 

 ous portions of the United States have been productive of many inter- 

 esting results. 



CATOSTOMUS ? GENEROSUS, Girard. 



U. S. Pacific R. R. SUIT. X, p. 221. 



From Provo, Utah, specimens of two and a-half pounds weight. 



