70 PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



1856 — Fario argyreus Gikard, Proc. Ac. Nat. Sc. Phila,. p. 218. 



Fario argyreus Girard, Pac. R. R. Surv. Rep. Fishes, p. 312, pi. 70, 1858. 



Salmo argyreus Suckley, Nut. Hist. Wash. Terr. p. 326, 1860. 



Sahno argyreus Sucklky, Monograph Salmo, p. 1 10, 1874. 

 1861 — Salmo uarreni Suckley, Aun. Lye. Nat. Hist. N. Y. vii, p. 308. 



Salmo warreni Suckley, Monograph Salmo, p. 147, 1874. 



Salmo ivarrciii Jordan &, Copeland, Check List, ]). 14-5, 1876. 



This species, the most abuudant and most \a.luable of the Salmonidw 

 of the Pacihc coast, is represented iu the present collection by nume- 

 rous partly grown specimens, some black-spotted and some nearly plain 

 silvery. The only question which now arises in the synonymy of this 

 species is as to its distinctness from its congener O. no In (Wii\hixum),(0. 

 lycaodon Pallas). The slender, more iusiibrm,and less compressed form 

 of the latter si)ecies, as well as its fewer branchiostegals and less lorUed 

 tail, seem to indicate si)eciflc difference. The types of Fario argyreus 

 Girard, 1 have examined. They are two in number, each about 8 inches 

 long, and are evidently young quinnats. The original types of Salma 

 warreni are apparently lost. There is, however, a bottle of small silvery 

 lishes, young individuals of quinnat, in the National Museum, labelled 

 by Dr. ISuckley " Salmo warreni P'' There can be little doubt that the 

 original types of Salmo icarreni were similar specimens of a young 

 Oncorhynchiis, most likely the young of 0. quinnat. 



There can be no possible doubt of the entire generic distinctness of 

 the genus Oncorhynchiis from Salmo, although the characters assigned 

 to Oncorhynchiis by Dr. ISuckley have no such value. The great devel- 

 opment of the anal fin and the peculiar form and dentition of the 

 vomer are of much more importance than the hooked jaws of the male, 

 although neither character was noticed by Dr. ISuckley. Indeed, this 

 author includes most of the Oncorhynchi, under one name or another, in 

 his subgen us Salmo. Thus the species termed by him quinnat, confluentus 

 ( = Iceta), argyreus {= quinnat), paucidens (= ncrJia), truncatus (= nerJca), 

 richardi (= nerJca), Icennerlyi, and icarreni (= quinnat), are all hook -jawed 

 species, with a long anal fin and an increased number of branchioste- 

 gals, yet they are all referred by Dr. Suckley to his subgenus Salmo 

 proper. 



An examination of the specimens of Oncorhynchiis iu the National 

 Museum, including all of Dr. ISuckley's types excepting richardi and 

 icarreni, has convinced Dr. Gill and myself that they all belong to five 

 species, 0. gorhuscha, 0. I'eta, 0. ncrka, 0. quinnat, and 0. lienncrlyi. 

 These are divisible into two very strongly marked subgenera, or perhaps 

 even distinct genera, — Oncorhynchus, including the tirst four species 

 named, and Hypsifatio, Gill, including only Icennerlyi. 0. kennerlyi is 

 very much smaller than the other species, and is much more compressed 

 and of a ditierent form. Its.form seems to me, however, rather an exag- 

 geration of that of 0. quinnat than a distinct tyi)e, and the resemblance 

 is almost as great between quinnat and Tcennerlyi as between quinnat 

 and gorhuscha. 



