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<br />28 BULLETIN OF THE UNITED STATES HS11 COMDilS81Oy. <br />back and 1><clow, although the number in the lateral ]in(- is about the same as in 0. <br />rr,burb,. Is";,les along middle line of back before dorsal obsolete or nearly so; mouth <br />a little larlm r tlrau in Cila ro]nrslrr. Least dr pf h of caudal pednnele, I j in maxillaryr <br />(1i in G. rnbual(r). Gila, cinoryi 11a61d & Girard seems to tic the young of G. clegans. <br />7. Ptycthocbeilus Iucius (,irard. Whitt- Salmon. <br />This sl„•cies is generally comuron, specimens havinf;been taken by usin the Gun- <br />nison laver at Delta, in the Uncompali re and in Green River. It reaches a weight <br />of SO pr,unds or more in the large stream-,, all(] i.e astly rerr <br />The yom,,, ? an .? warded as a good food-fish. <br />„ have always a black caudal shot, the. fins are slightly reddish, and <br />there i• a Slight trace of a pale lateral band below a darker one. <br />The scales are about 87 instead of 104 as shown ill Girard's figure. Maxillarv 23 <br />in bead. <br />8• Agosfa yarrows Jorcl:ru R Yvermaim, ra1,. nov., _llinnr,u. (.ipocrryr oecnla Cope and Yarrow; nut <br />This species is very- abundant, in fhe sniall streams ill the mountain meadows. In <br />the larger, streaurs it is less conunou, and in the rivers below the mountains it is rare. <br />Unr specimen; are. fr„ul Tomichi Creek, Gunnison River at Gunnison and at Delta, <br />L: ncompal,gre, River, Green River, Eagle River at Gypsum, Rio tie las Animas Perdi. <br />das, Pio Florida, and Leitner's Creek. <br />Description from specimens from Tomicbi Creek. Head 4 in length depth 11. 7; A. 7; scales 74, 80, 77, 80, 83, 80, 83, 79, 75, 70, 74, 74, 807 82, in 14specimens <br />, <br />the arerage being about I6-30-13. Length from 2 to 5 inches. <br />Ludy little Compressed, elongate; head long and rather heavy, bluntish ; snout <br />short, obtume, _'to 21 in head; eye. small, 5j to G; barbel small but distinct. Up_ <br />t per lip, in about half the specinreus, separated from the skin of the snout by a fold, <br />i as usual in Agosia and most other Qi1prinidre. In the rest of the typical examples the <br />upper lip is joined ruesially to the snout by a distinct frenum. Thesespeciwens, <br />although to all appearance specifically identical with the others, would belong to the <br />genus Rhfnichthy,v., as now defined. The frenum is, however, considerably narrower <br />than in ];hinichthys, and this fact may for the present serve to separate the species <br />from that genus. Lips full; maxillary about 33 in bead; scales small; lateral line <br />complete; dorsal fin well backward, its insertion about midway between base of cau- <br />dal and eye. Pectoral 1j in head, usually- not quite reaching to ventrals, the latter <br />reaching past rent. Candal large. Color dark olive, more or less mottled above with <br />black ; sides with two ill-defined dark lateral bands, the interspace paler. Axils of <br />fius mostly crimsolr ill life as in related species. Tbis species seems to differfrom A. <br />uuhila and A. adobe ill its smaller stales, these species having less than 70. Its scales <br />are larger than in Agosia oscula. <br />In the type of Argyreus osculus, from Rio Baboconruri, in Arizaua, there are 90 <br />scales. In the types of Apoeope vent.ricosa, Cope, from "Arizona and New Mexico," <br />there are 89. Y?e have therefore been compelled to regard our specimen as different <br />front the original Argyreus osculus_ventricosa. <br />We have named this species for our friend, Dr. Henry U. Yarrow, in recognition <br />of his work oil the fishes of the Rio Colovado. <br />9. Salmo mylriss WalLauru (var. pleuriticus Cope). <br />' Trapper's Lake, Eagle River, Cafiou Creek, Sweetwater Lakes, Gunnison River, <br />Rio hlorida.