166 SALMONID^E. 



1. SALMO. 

 Artedi, Gen. Pise. p. 11 (1738) ; Cuv. & Val. Hist. Poiss. xxi. p. 166 (1848) ; 



Giinth. Cat. Fish. vi. p. 2 (1866). 

 Salvelinus, Richards. Faun. Bor.-Arn. iii. p. 169 (1836). 

 Fario, Cuv. & Val. t. c. p. 277. 

 Solar, Cuv. & Val. t. c. p. 314. 

 Umbla, Rapp, Fische Boclensee, p. 32 (1854). 



Oncorhynchus, Suckley, Ann. Lye. N. Y. 1861, p. 312 ; Giinth. t. c. p. 155. 

 Bypsifario, Gill, Proc. Ac. Philad. 1862, p. 330. 

 Trutta, Siebold, Susswasserf. Mitt. Eur. p. 280 (1863). 

 Hucho, Giinth. t. c. p. 125. 

 Cristivomer, Jord. Man. Vert. E. U.S. 2nd ed. p. 356 (1878). 



Mouth large, with strong dentition. 10 to 15 branchiostegal rays. 

 Dorsal fin moderately large, opposite or nearly opposite to ventrals. 

 9 or 10 ventral rays. Scales small or very small. 



Cold and temperate parts of Northern Hemisphere. 



1. SALMO TRUTTA. 

 Linn. Syst, Nat. i. p. 509 (1766). 



The North-African Trout belongs to a variety (scarcely distinct from 

 the var. fario, L., of Europe) of which the following is the synonymy : — 



Salar macrostigma, A. Darner. C. R. Ac. Sci. xlii. 1858, p. 160, and Rev. et Mag. 



Zool. 1858, p. 396, pi. x. 

 Salmo lepasseti, Zill, Ann. Sci. Nat. (4) ix. 1858, p. 128. 

 Salmo macrostigma, Giinth. Cat. Fish. vi. p. 76 (1866) ; Vincig. Boll. Agrar. 



Rorna, xviii. 1896, p. 107; Bouleng. Ann. & Mag. N. H. (7) viii. 1901, 



p. 108. 

 Salmo fario, var. macrostigma, Bouleng. Ann. & Mag. N. H. (6) xviii. 1896, 



p. 152. 



Depth of body 3f to 4^ times in total length, length of head 4J to 4J 

 times. Eye 3§ (young) to 4§ times in length of head ; maxillary 

 extending to below posterior third of eye in young, to below posterior 

 border of eye or a little beyond in adult; vomerine teeth forming a 

 double, zigzag row. 10-12 gill-rakers on lower part of anterior arch. 

 Dorsal IV 9-10. Anal III 8-10. 95-128 scales in lateral line, 14-16 

 in an oblique series between adipose fin and lateral line. Caudal 

 deeply notched in the young, truncate or feebly notched in the adult. 

 Caudal peduncle \\ to If times as long as deep. Olive-brown above, 

 shading to golden yellow or yellowish white beneath ; a series of 9 to 



