Jordan and Evermann. Fishes of North America. 171 



stout, subfusiform. Dorsal inserted midway between snout and upper 

 caudal rays; caudal short, emarginate. Color dark brown, faintly 

 mottled, sides with orange in the males. L. 1 foot. Basin of the Rio 

 Grande, Colorado to Chihuahua ; very common, (plebeius, commonplace. ) 



plebeius, BAIRD & GIRARD, Proc. Ac. Nat. Sci. Phila., 1854, 28, Rio Mimbres, a 

 tributary of Lake Guzman, Chihuahua. (Type, No. 168.) 



* pl.'lnins, GtiNTHER, Cat., vn, 15,1868; Pantosteus plebeius, JORDAN, /. c., 184, 1878; 

 JORDAN & GILBERT, Synopsis, 122, 1883. 

 Patitosteitsjarrot-ii, COPE & YARROW, but not Minomus jarrovii, COPE. 



274. PANTOSTEUS DELPHINUS, (Cope). 



(BLUEHEADED SUCKER.) 



Head rather short, 4f to 4f in length ; upper lip broad and pendant ; 

 lower lip very broad, more deeply incised than in P. jordani, the lobes 

 pointed; tail very slender, the caudal long; mouth large, with very full 

 lips ; depth about 5 in length ; scales 16-96 to 105-14. D. 10. Color dusky 

 bluish above, males with sides more or less rosy, the snout and fins tuber- 

 culate. A curved yellowish streak extending from belly behind, and 

 above pectoral axil. L. 12 inches. Mountain streams tributary to the 

 Colorado River in Western Colorado and Wyoming; very abundant. 

 (delphinus, dolphin.) 



Minomus delphiims, COPE, Haydeu's Geol. Sur. Wyoming for 1870, 435, 1872, probably Henry 



Fork of Green River, Wyoming. 

 Minomus bardiis, COPE, /. c., 436; locality not certain, but probably Henry Fork of Green 



River, "Wyoming. 

 Pantosteus virescens, COPE, Wheeler Survey, Zool., 675, 1876, wrongly ascribed to Arkansas 



River at Pueblo; JORDAN & GILBERT, Synopsis, 124, 1883. (Type, No. 16758.) 

 Pantostem delphinus, JORDAN, Bull. U. S. Fish Com., 1889, 19. 



275. PANTOSTEUS GUZMAN1ENSIS, (Girard). 



Head 5 ; depth 5. D. 9 ; A. 8. Scales 14-90-14. ody stout, little 

 compressed. Head nearly as broad as eye; eye small, about i snout; 

 mouth small; lips with considerable free margin. Dorsal inserted mid- 

 way between snout and caudal ; caudal deeply notched ; anterior rays of 

 dorsal longest. (Garman, description of C. nebuliferus.) Streams of 

 Coahuila and Chihuahua, tributary to the Rio Grande. Possibly iden- 

 tical with P. plelmus, but the small scales and short head approach 

 nearer P. delphinus, which is in a different river system. 



tfi/.^,/wx (juz,H,tni<>n*i** GIRARD, Proc. Ac. Nat. Sci. Phila., 1856, 173; Rio Janos, a tribu- 

 tary of Lake Guzman, Chihuahua. (Type, No. 260.) 



Clxt<>m><snebuUfen<s, GAUMAN, Bull. Mus. Comp. Zool.. vin, 89, 1881, Rio Nazas, Coahuila. 

 Cn/oxtoinnsnebulifer, JORDAN & GILBERT, Synopsis, 883, 1883. 



276. PANTOSTEUS JORDANI, Evermann. 



Head 4| to 5|; depth 4| to 5. Eye 4* to 5 in head. D. 10 or 11 ; A. 7. 

 Scales 16-90 to 100-14, 48 before dorsal. Body rather stout; snbterete; 

 head short, conic; iuterorbital space broad, little convex ; snout long, 2 in 

 head; mouth large; lower lip broad, little incised, covered with moderate 



*Thc type of O/x/w/s musma&MU is a l',i,,t*tett. It has 100 seal. -s in tin- lat.-ral lin-, -is 

 Bcuh-s tK'fore dorsal the tins hi-h. Porsal rays 11; bead ft in length, .-y.-s small; un .,rain,'o lat- 

 eral baud. It is probably identical with C. nebulifer, from the same faunal area. 



