504 Bulletin 47, United States National Museum. 



jaw; the whole region uniform bright orange; opercle largely orange; 

 dark spots chiefly posterior, large and well marked, some as large as pupil 

 on tail and posterior part of body ; smaller and well marked on dorsal ; a 

 few small ones scattered along forward to the head in two specimens ; 

 none on body before adipose fin in the other; upper anterior angle of 

 dorsal abruptly yellowish white ; this color edged by a dark oblique 

 streak made by coalescent spots ; the rest of the fin light olive with 4 or 

 5 rows of small black spots ; pectorals light orange ; ventrals deep orange, 

 with a faint blackish tip ; the anterior edge of the fin conspicuously and 

 abruptly whitish, as in Salvelinus fontinalis ; anal dusky orange, the tips 

 of the last rays blackish, the outer anterior corner abruptly white, the 

 white stripe wider than the pupil and separated from the color of the fin 

 by a dusky shade-; caudal olive, tinged with orange on its lower edge, 

 and profusely spotted with black; inside of mouth pink, of gill cavity 

 light orange. The small size of the scales is shown in their lack of imbri- 

 cation rather than by their increased number. Mountain streams on the 

 west side of Mount Whitney, tributary to Kern River, locally abun- 

 dant in Volcano Creek, and South Fork of Kern River ; also largely intro- 

 duced into streams about Owen Lake, on the east slope of the mountains, 

 streams formerly destitute of trout. (Gilbert.) This form is apparently 

 derived from the Kern river trout, var. gilberti, but is so much modified 

 that unless intermediate specimens now exist, it may be ranked as a dis- 

 tinct species. ( " Agua-bonita," beautiful water, name of a cascade on 

 Volcano Creek, near which this trout abounds.) 



Salvto mykiss agua-bonita, JORDAN, Proo. U. S. Nat. Mus., 1892, 481, Volcano or "Whitney 

 Creek,* California. (Types, No. 514, L. S. Jr. Uuiv. Mus. and 44237, U. S. Nat. Mus. 

 Coll. Mr. Harvey of Lone Pine, Cal.) 



236. CRISTIVOMER, Gill & Jordan. 

 (GREAT LAKE TROUT.) 



Oristivomer, GILL & JORDAN, in JORDAN, Manual Vertebrates E. U. S., Ed. 2, 356, 1878, (namay- 

 cush). 



This genus contains one or two species large, coarse chairs, distin- 

 guished from Salrelinus by the presence of a raised crest behind the head 

 of the vomer and free from its shaft; this crest is armed with teeth. The 

 hyoid teeth constitute a strong, cardiform band. The typical species is 

 a large charr or trout, spotted with gray instead of red, and found in the 

 larger lakes of Eastern North America, (crista, crest; vomer, vomer.) 



782. CRISTIVOMER NAMATCUSH (Walbaum). 



(GR".AT LAKE TROUT ; MACKINAW TROUT ; LONGE (VERMONT) ; TOOXJE (MAINE) ; NAMAYCUSH ; 



MASAMACUSH.) 



Head 4i ; depth 4 ; eye large, 4|. B. 11 or 12 ; D. 11 ; A. 11 ; lateral line 

 185 to 205. Body elongate, covered with thin skin, there being no special 

 development of fatty tissue. Head very long, its upper surface flattened. 

 Mouth very large, the maxillary extending much beyond the eye, the head 



* It has since been ascertained that the original type came from Cotton wood Creek on the east 

 slope of Mount Whitney, the variety having been introduced there from Volcano or Whitney 

 Creek. 



