50 NEW YORK STATE MUSEUM 



Inches 



Snout to ventral ........................................... 



Length of ventral ..................... . .................... 2^4 



Snout to anal ................... . ........................... 16% 



Anal base ................... . . . ........................... 1% 



Longest anal ray ............ ............................... 1% 



Last anal ray ............................................. 1% 



Snout to adipose dorsal ..................................... 17% 



Width of adipose dorsal ................ , .................... % 



Length of adipose dorsal ................................... % 



Length of pectoral ......................................... 3^4 



Upper jaw ................. ............................... 2% 



Maxilla ................................................... 2 



The head has about 28 dark spots, the largest on the gill cover, 

 oblong, f inch long. Body with many large and small black 

 spots, a few with a pale ring around them, and some as large as 

 the largest on the gill cover; one on the caudal peduncle of one 

 side distinctly X-shaped. General color dark bluish gray; belly 

 and lower parts iridescent silvery; fins all dusky; the dorsal 

 with many black spots; eye pale lemon, the upper part dusky. 



Gill rakers, 9+11, the longest ft,- inch. B. 11; D. 10. Scales, 

 21-123-20. 



133 Salmo henshawi Gill & Jordan 



Lake Tahoe Trvwt; Red-throat Trout (Introduced) 



Salmo henshawi GILL & JORDAN, Man. Vert. ed. 2, 358, 1878, Lake Tahoe; 



Kept. Chief Eng. Part 3, 1878, App. NN, 1619, pi. IV; JORDAN, Proc. 



U. S. Nat. Mus. I, 75, 1878. 

 Salmo purpuratus var. henshawi JORDAN & GILBERT, Bull. 16, U. S. Nat 



Mus. 316, 1883. 

 Salmo mykiss CHENEY, Third Ann. Kept. N. Y. Comm. Fish. 239, color pi. 



facing p. 238, 1898. 

 Salmo mykiss henshawi JORDAN, Bull. U. S. F. O. IX, 14, pi. II, fig. 5, 1891; 



JORDAN & EVERMANN, Bull. 47, U. S. Nat. Mus. 493, 1896. 

 Salmo clarkii henshawi JORDAN & EVERMANN, op. cit. 2819, pi. LXXIX, fig. 



208, 1900. 



Body elongate, not much compressed, its greatest depth one 

 fourth of the total length without caudal; caudal peduncle 

 rather long; its least depth equaling two fifths of the length of 

 the head; head long, conical, slender, its length contained about 

 four times in the total to caudal base; a slight keel on the top 

 of the head; snout obtusely pointed; maxilla not extending far 

 behind the eye, about equal to pectoral, which is three fifths of 



