76 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



3. SALMO IRIDEUS Gibbons. 



Pacific Coast Brook Trout. 



1855— Salmo iridea Gibbons, Proc. Cal. Ac. Nat. Sc. p. 36. 

 Salar iridea Girard, Proc. Ac. Nat. Sc. Phila. p. 220, 1856. 



Solar iridea Girard, Pac. R. R. Expl. Fishes, p. 321, 1858, pi. 73, f. 5, and pi. 74. 

 Salar irideus Jordan, Catalogue Fishes N. A. p. 431, 1878. 

 Salmo irideus Gunther, Cat. Fishes Brit. Mus. vi, p. 119, 1867. 

 Salmo iridea Suckley, Monograph Genus Salmo, p. 129, 1874. 

 Salmo irideus Jordan &, Copeland, Check List, p. 144, 1876. 

 Salmo irideus Hallock, Sportsman's Gazetteer, and of writers on fish and fish- 

 culture generally. 

 Salmo irideus Jordan, Man. Vert. ed. 2d, p. 358, 1878. 

 Salmo rivularis Ayres, Proc. Cal. Ac. Nat. Sc. p. 43. 



1856 — Fario gairdneri Girard, Proc. Ac. Nat. Sc. Phila. p. 219, (not Salmo gairdneri 



Rich., a species with the "caudal fin semilunate" and "no hyoid teeth"; 

 hence neither the present fish nor S. clarkii Rich.). 

 Fario gairdneri Girard, Pac. R. R. Expl. Fishes, p. 313, pi. 71, f. 1-4, 1858. 

 1858— Fario newberrii Girard, Proc. Ac. Nat. Sc. Phila. p. 224, 1858, (substitute for 

 gairdneri). 



Salmo newberrii Suckley, Monograph Genus Salmo, p. 159, 1874. 

 Salmo ticwberryi Jordan &, Copeland, Check List, p. 144, 1876. 

 1858 — Fario clarkii Girard, Proc. Ac. Nat. Sc. Phila. p. 219, (not Salmo clarlcii Rich.). 



Fario clarkii Girard, Pac. R. R. Expl. Fishes, p. 314, pi. 71, f. 5-8, 1858. 

 1860— Salmo masoni Suckley, Nat. Hist. Washington Terr. p. 345, (substitute for clarkii). 

 Salmo masoni Suckley, Monograph Salmo, p. 134, 1874. 

 Salmo masoni Jordan & Copeland, Check List, p. 144, 1876. 

 1860— t Salmo gairdneri Suckley, Nat. Hist. Washington Terr. p. 331, (not of Richardson). 



? Salmo gairdneri Suckley, Monograph Salmo, p. 114, 1874. 

 1867 — Salmo pnrpuratus Gunther, Cat. Fishes Brit. Mus. vi, p. 116, 1867, (in part; prob- 

 ably not of Pallas, whose specimens came from Siberia, = Salmo mykiss Wal- 

 baum, = Salmo muikisi Bloch, both names prior to Pallas, who gives "Mykiss" 

 as the vernacular name of purpuratus). 



Habitat. — California to British Columbia, in streams of or west of the 

 Sierra Nevada and Cascade Ranges. 



This abundant Trout is represented by several specimens. In justifi- 

 cation of the above synonymy, I may say that I have examined speci- 

 mens purporting to be the types of irideus Gibbons, rivularis Ayres, 

 newberrii Girard, masoni Suckley, aud gairdneri Suckley, and that I 

 have no hesitation in considering all (excepting gairdneri Suckley) as 

 representatives of a single species. 



The typejof S. neicberrii, which Dr. Suckley was unable to find, is a 

 well-preserved young fish, without hyoid teeth. It has a rather wider 

 maxillary than is usual in irideus and rather smaller scales (33-140-33), 

 and the vomerine teeth are in a single, somewhat zigzng row. Never- 

 theless, I believe it to be an irideus, with which it agrees in every other 

 respect. 



The types of S. masoni, the one a moth-eaten skin and the other a 

 specimen in alcohol, are not different in any respect from the ordinary 

 irideus. Notwithstanding Dr. Suckley's statement that the scales in his 

 type are "double the size of irideus", his typical specimens have each 

 about 130 scales in a longitudinal series, which is about the usual num- 

 ber in irideus. 



