46. SALMONID^E SALVELINUS. 319 



margins yellowish white. Body long and slender; head rather small, 

 the snout blunt; mouth not large, the maxillary reaching posterior mar- 

 gin of orbit in male only ; teeth very small ; teeth on the middle line of 

 the byoid bone; angle of preopercle much rounded; gill-covers without 

 concentric strice; pectoral not longer than the head without snout; veu- 

 trals not to vent ; caudal deeply forked ; scales minute. Head 4i ; depth 

 5-6. D. 11; A. 9; B. 11; coeca 28-42; vert, 63. L. 12 inches. (Giintltcr.) 

 Lakes of Arctic America, Discovery Bay, and Cumberland Gulf. 



(Salnw narcsii Giiuther, Proc. Zool. Soc. Lond. 1877, 476, plate; Bean, Bull. U. S. 

 Nat. Mus. xv, 135.) 



512. S, arciurus (Gthr.) Gill & Jor. 



Dull greenish, silvery or reddish below ; lower fins yellowish ; no red 

 spots (on specimens seen). Body rather elongate; head small, the snout 

 very obtuse ; mouth moderate, the maxillary in the male reaching about 

 to posterior margin of orbit; teeth small; a band of hyoid teeth ; pre- 

 opercle with a distinct lower limb ; pectoral little shorter than head, 

 reaching more than. half way to ventral. Caudal moderately forked; 

 scales minute. Head 4; depth 5; D. 11; A. 10; B. 11; coeca 31-44 

 L. 12 inches. Victoria Lake and Floeberg Beach, Arctic America, the 

 northernmost Salmouoid known. (Giinther.) 



(Salmo arcturvs Guutlier, Proc. Zool. Soc. Lond. 1877, 294, plate.) 



513. S. nialma (Walb.) J. & G. Dolly Vardcn Trout; Bull Trout; Ked-spoltcd 

 Trout; Salmon Trout; Malma ; Golct. 



Body stout, the back somewhat elevated, deeper and less compressed 

 than in S.fontinaUs. Head large, snout broad, flattened above. Mouth 

 large, the maxillary reaching past the eye. Eye 4J in head. Fins 

 short; the caudal fin slightly forked or almost truncate; adipose fin 

 usually large; in large specimens its length is twice that of the eye. 

 General color olivaceous; the sides with round red spots near the size 

 of the eye, the back commonly with smaller pale ones, a feature of color- 

 ation which distinguishes this species at once from the others; lower fins 

 colored as in fontinalis, dusky, with a pale stripe in front, followed by a 

 dark one; sea-run specimens silvery, with the spots faint or obsolete; fins 

 and back without dark reticulations. Gill-rakers without concentric 

 strife, Head 3^; depth 4. D. 11; A. 9; scales 39-240-36; pyloric 

 coeca large, 45-50; gill-rakers about 8 + 12 as in others. L. 15 inches. 

 Streams west of the Cascade Range, from Northern California to Alaska 



