70 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



18b6—Fario argyreus Girard, Proc. Ac. Nat. Sc. Phila. p. 218. 



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



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



Salmo argyreus Suckley, Monograph Salmo, p. 110, 1874. 

 1861— 5a/mo ivarreni Suckley, Ann. Lye. Nat. Hist. N. Y. vii, p. 308. 



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



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



This species, the most abundant and most valuable of the Salmonulw 

 of the Pacific coast, is represented in the present collection by nume- 

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

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

 species is as to its distinctness from its congeuer 0.wey7ta(Walbaum),(0. 

 lycaodon Pallas). The slender, more fusiform, nnd less compressed form 

 of the latter species, as well as its fewer brauchiostegals and less forked 

 tail, seem to indicate specific difference. The types of Fario argyreus 

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

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

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

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

 by Dr. Suckley " tSabno warreni f'' There can be little doubt that the 

 original types of Salmo tvarreni were similar specimens of a young 

 OncorhynchuSj most likely the young of 0. quinnat. 



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

 the genus Oncorhynchus from Salmo, although the characters assigned 

 to Oncorhynchus by Dr. Suckley 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. Suckley. 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, conjluentus 

 ( = Iccta), argyreus (= quinnat), 'paucidens (= nerica), truncatus (= nerlca), 

 richardi (= nerica), Jcenneriyi, and warreni (= quinnat), are all hook-jawed 

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

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

 proper. 



An examination of the specimens of Oncorhynchus in the National 

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

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

 species, 0. gorbuscha, 0. Uta, 0. nerica, 0. quinnat, and 0. kenncrlyi. 

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

 even distinct ^euera,— Oncorhynchus, including the first four species 

 named, and i///ps?/a>io. Gill, including only Icennerlyi. O.liennerhji is 

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

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

 geration of that of 0. quinnat than a distinct type, and the resemblance 

 is almost as great between quinnat and Jcenneriyi as between quinnat 

 and gorbuscha. 



