208 CALIFORNIA ACADEMY OF SCIENCES. 



longer than base, 2% in head. Last ray of dorsal pointed. 

 Origin of anal midway between origin of dorsal and base 

 of caudal, margin irregular, anterior rays three times 

 length of posterior, and equal to base of fin, 2I in head. 

 Adipose fin high and slender, situated immediately behind 

 anal. Pectoral if in head. Ventrals under middle of 

 dorsal, 2| in head. Caudal broad, slightly emarginate, 

 nearly truncate when spread, its corners not rounded, its 

 longest rays i l /z in head. Least depth of caudal pedun- 

 cle 3| in head. Pyloric coeca about 51, the longest about 

 if in head, and very slender. Color in alcohol very dark 

 steel blue above, becoming paler below, nearly white an- 

 teriorly on belly where only the margins of the scales are 

 punctate; no silvery anywhere; lower jaw dusky, a large 

 black blotch on cheek between suborbital and premaxil- 

 lary. Sides, back, top of head, dorsal and caudal fins 

 with few small dark spots; pectorals dusky, slightly 

 spotted at base; anal slightly dusky, without spots; ven- 

 trals dusky with a few spots in middle; adipose fin with 

 a few spots; lower fins all tipped with pale, probably yel- 

 lowish red in life. Spots all very small and faint, not 

 confined to posterior part of body. 



The specimen before us, No. 1863, L. S. Jr. Univ., is 

 a male, 18% inches long. It was taken at Fairholme on 

 Lake Crescent, Clallam county, Washington, March 12, 

 1896, by Mrs. G. E. Mitchell of Fairholme. 



The following account of Lake Crescent is given by 

 Mr. M. J. Carrigan: 



"Lake Crescent, from which the blue-backs are taken, 

 is about twenty miles from Port Angeles, and is a most 

 beautiful and prolific body of water. It is in the Olympic 

 Mountains, is seven hundred feet above the level of the 

 sea, and in size is about ten miles long by two miles wide. 

 It is very deep, many hundreds of feet in places, and its 



