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<br /> 26 BULLETIN OF THE UNITED STATES F'ISII COMDfISSION.
<br /> Brothers have a trout hatchery further up the river at Los Pinos. Like. the Auim;
<br />this is an escellelit trout strea
<br /> m.
<br />20. Ignacio Lakes.-Near Los Pinos Riverare the San Ignacio Lakes, one of 60 ae
<br />one of 40 acres
<br />at 8
<br />000 feet elev
<br />ti
<br /> ,
<br />,
<br />a
<br />on. They are fed bN springs and have no out,],
<br />They have no fishes but are said to be " full of do;; fish (Amblystoma
<br />f) whi
<br />th
<br />h d
<br /> ,
<br />c
<br />evo
<br />e young trout which have been several times placed in the lakes." We were unal
<br />to verify this statement whi
<br />h
<br /> c
<br />was made by a citizen of Durango.
<br />21. Rio de. 1a8 Piedras, said to be the best trout
<br />t
<br /> s
<br />ream in the San Juan basin.
<br />similar to Los Pinos, but smaller.
<br /> 22. Rio Narajo, which flows into the San Juan near Juanita, is also similar;
<br />clear stream with gravell
<br />b
<br /> y
<br />ottom and wooded banks.
<br />23. Rio San Juan, which receives the waters of all these, is, when crossed by tl
<br />railroad at Arb
<br />l
<br /> o
<br />es, about the size of Los Pinos at Ignacio. Its water is warm an
<br />not quite clear; the bottom of gravel and st
<br /> ones. About Pagosa Springs, above A:
<br />boles, it is a trout stream. Below Arboles it becomes
<br /> very yellow, and at last i
<br />bears a volume of very muddy water into the Colorado.
<br />i
<br />'i FISHES OF THE UPPER COLORADO BASIN
<br /> .
<br />1. Catostomus latipinnis (Baird & Girard). Flannel-mouth Sucker
<br />
<br />_ .
<br />Very common in the Grand River at Glenwood Springs, in the Gunnison any
<br />Uncompahgre at Delta
<br />and in Green Ri
<br />
<br />? ,
<br />ver. It reaches a length of 1j to 2 feet and
<br />weight of 3 to 5 pounds. Dorsal rays usually 11, sometimes 12 or ev
<br />13
<br />d
<br /> en
<br />pe
<br />. Candy
<br />uncle _ slender, and the fins all high; these characters especiall
<br />k
<br />
<br />
<br />=_- y mar
<br />ed in of
<br />males. Large specimens,, la life black'
<br />- bright cream oran olive abo Pea abruptly,; paler ?belo W S
<br />y ge
<br />'dee
<br />est,on th
<br /> ,
<br />p
<br />e tall ; snout .and' cheeks dale orange belly pu
<br />while; lower fins all more orle
<br />n--
<br />
<br />j ssora
<br />upper -f3ns-dusky olive ti
<br />, pectoral dusky, orange above, creamy b
<br />ge; "I Oran
<br />elow; aril blackish
<br />; lips very hi
<br />F
<br />kt
<br />`
<br /> .
<br />c
<br />and larg
<br />emale specimens have the same color, the only difference being ,that the male has t
<br />anal and lower lobe of o
<br />od
<br />l
<br /> a
<br />a
<br />tuberculate. Stomach frill of confervm and other veg
<br />tation.
<br />- Catostomwv discobolua Cope, from Green River in Wyoming, is probably based
<br />the young of Catostomus lati
<br />{.nnis
<br />Th
<br />'
<br /> p
<br />.
<br />e fishes from
<br />Idaho, formerly recorded by
<br />as Catostomus discobolus, are probably different.
<br />
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<br />2. %yrauchen cppho_(Leekngtonj:- _Bazor-baakuekrr; $ _ - _ -
<br />- - +g bue$ Stic7cer: -
<br />This remarkablefish'is very abundant in the river channels of the Colorado Bas,
<br />It reaches a weight of 8 to 10 pounds, and is largely used for food. Specimens we
<br />taken by us at Delta, both in the Gunnison and the Uncompahgre, and in Green Riv,
<br />Specimens of 8 inches have the depth equal to length of head, 3f in lengt
<br />Scales 13-72, 73, or 74-13; D,, 14.. First dorsal ray, Ij in =head base of:the.fin,
<br />Least depth-ot caudal _ l_. ..
<br />peduncle, 3 in iesd; 1j in -di i 6
<br />stance from la- t anal to first ca
<br />dal ray. Nuebal crest much elevated commencing by a prominence close to the-pad;
<br />and with no scales before it Mucha] crest neail-
<br />-;? _ y er gs3itelalied -xiu the aiecdisii Line
<br />3. gpra..chen uncam eh _
<br />P g,Te J?rdsn &-Esermana, ap acv: (Plate v, 'i?sl
<br />A single young specimnM of $yrawhen, about 7 inches Iongt taken in the Uncon-
<br />pahgre River, close to the rsilway'statiou at Delta, differs.maeh from the others, an
<br />probably represents a distinct specles of the saftie singul - e
<br />
<br />AN
<br />N
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