1. SALMO. 



145 



the first ray pure white ; anal fin brownish red, with two of the 

 rays white ; jaws less ciu'ved, branchiostegak fewer by one. 



" Stellcr believes that the migi-atory fishes do not live beyond the 

 third year ; in the lake, however, they attain an age of many more 

 years. He has had young specimens of this variety of one and two 

 years old, 10 to 14 inches in length, the lower fins of which were 

 bright red, the manchble more or less produced. He relates that a 

 variety occurs not only in this lake but also in the lake of the island 

 Caraja, very slender in shape, and almost entirely ferruginous, 

 without si:)ots, very unUlce the ordinary variety in ajipearance. 

 These, he thinks, are hybrids, born in the lake, and the offspring of 

 female Sahno callaris and of male S. sanguinolentus, of which species 

 many are carried into these lakes, placed at an exceedingly elevated 

 position, by a certain inundation of the sea, together with S. caUaris, 

 and are both immediately seen to commence propsigation and soon 

 afterwards to have their sexes in common, which is not without 

 some semblance of truth." 



It is quite evident that the notes given by PaUas above do not 

 refer to a Charr, none of which migrate to the sea, as far as our 

 present experience goes ; therefore Pallas appears to have joined the 

 life-history of some fish to specimens of a distinct species. As re- 

 gards the fish noticed by SteUer, no opinion can be off'ered until 

 the localities mentioned are visited again, and their Salmonoids ex- 

 amined. . 



17. Salmo leucomaenis. 



? Salmo kmidsha, Pallas, Reiae, iii. Append, p. 700 ; Gm. L. p. 1373. 

 Salmo leucomEenis, Pallas, Zoot/r. Itoss.-As. iii. p. 356 ; Cuv. i^- Vul. 

 xxi. p. 243. 



One of the two specimens from Pallas's CoUectiou, named -S. leu- 



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