Jordan and Evermaiin. — FisJies 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, {plcbcias, commoni)lace.) 



Cnloftoiiiits pleheiiis,'BAini> & Giuard, Proc. Ac. Nat. Sci. riiihi., 1854, 28, Rio Mimbres, a 



tributary of Lake Guzman, Chihuahua. (Type, No. 1C8.) 

 Calnsloiiius plelieiiis, Gi'NTHER, Cat., Vli, 15, 18GS; Piiiiliislcii.i pleheiiis, JoilDAN, /. c, 184, 1S78; 



Jordan & Gilbert, Synopsis, 122, 1883. 

 Pnnlosli'iiiiJKn-orii, Cope ct Yarrow, but not 3TiHomus jarrovU, (JoPE. 



274. PANTOSTEUS DELPHINUS, (Copo). 

 (Blueiieaded Sucker.) 

 Head rather short, 43to 4t 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 exteuding from belly behind, and 

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

 Colorado River in Western Colorado and Wyoming; very abundant. 

 {delj>hintis, dolphin.) 



Miiwmus delphinus, CopE, Ilaydoii's Geol. Snr. Wyomina; for 1870, 435, 1872, probably Henry 



Fork of Green River, Wyoming. 

 Minomns hardiis, Coi'E, I. c, 43G; locality not certain, but probably Henry Fork of Green 



River, Wyoming, 

 Pantosteus virencfns. Cope, Wheeler Survey, Zoiil., C75, 187(!, wrongly ascribetl to Arkansas 



River at Pueblo; Jordan & Gilbert, Synopsis, 124, 1883. (Type, No. 1G758.) 

 Pantoslen3 delphinus, Jordan, Bull. U. S. Fish Com., 1889, 19. 



275. PANTOSTEUS GUZMANIEXSIS, (Giranl). 

 Head 5 ; depth 5. D. 9 ; A. 8. Scales 14-90-14. Body 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. nehuliferus.) 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. 



GUosloimix gur,m(niieii.w,* Gui\RD, Proc. Ac. Nat. Sci. Pliila., 185G, 173; Rio Janos, a tribu- 

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

 Calosiommnehuliferits, Garman, Bull. Mus. Conip. Zool.. viii, 89, 188], Rio Nazas, Coahuila. 

 Catostomns nebulifer, Jordan &. Gilbert, Synopsis, 883, 1883. 



276. PANTOSTEUS JORDANI, IJvermann. 



Head U to 5^; depth 4 J to 5. Eye 4i to 5 in head. D. 10 or 11 : A. 7. 



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



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



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



*The typo of CiUosldiHiis giizxianietisU is a rantosleus. It has 100 scales in the lateral Hue, 48 

 scale." before dorsal, the fins liijfh. l)or.-:al rays 11; head 5 in lenjrth, eyes small; an orange lat- 

 eral band. It in probably identical with C nebulifer, from tlie same funnal area. 



