<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.
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