1. SALMO. 



141 



delicious fish of the fish-ponds at St. Petersburg, found more rarely 

 in the river Kama, and now also in the Caspian Sea. I have little 

 doubt that this species, which is very seldom taken in the Wolga, 

 enters the Kama by the northern streams flowing into that river, of 

 which several, tributaries of both the Kama and the Kolva, are near 

 to the sources of the streams flowing into the Petschow and the 

 Vitchegda ; so that, when the waters are swollen by the snow, the 

 Trout (which usually ascend to the extreme sources of the rivers) 

 would easily be able to cross from one to the other. With reference 

 to the river Muilwa, which flows into the upper Kama, eye-wit- 

 nesses have assured me that it rises from a marsh which in spring 

 time, being entirely inundated, is changed into a lake, whence a stream 

 flows likewise to the Vitchegda. By these interlacements of the 

 rivers the migratory fish ascending from the ocean have been able to 

 cross into the Kama and there to multiply their species. 



II. Asia. 



14. Sabno fluviatilis. 



Salmo taimen, Pallas, Reise, ii. App. p. 716 ; L., Gm. p. 1.372. 

 fluviatilis, Pallas, Zoogr, Moss.-As. iii. p. 359. 



B. 11. D. 13. A. 13. L. lat. 187. 



Similar in form to S. fario ; head of moderate size, its length 

 being two-ninths of the total (without caudal). Snout of moderate 

 extent ; eye rather small. MaxiUary very broad and strong, ex- 

 tending to behind the eye ; teeth rather small ; vomerine teeth. 

 The lower limb of the praeoperculum is oblique and very long. 

 Adipose fin large and thick ; caudal emarginate. 



We refer only one (No. 85) of the two specimens from Pallas's 



