142 



SALMONID^. 



collection, named S. jtuviatilis, to this species ; it is a male, 2 feet 

 long ; the other specimen is better referred to 8. coregonoides. Several 

 characters, as the form of praeopercnlum, solid bones of the skull, 

 large ar>d thick adipose fin, are found in both fishes ; and it is possible 

 that the specimen referred to S.fluviatilis may eventually prove to 

 be merely the male of 8. coregonoides. 



Pallas adds the following notes : — 



" This fish (which, being a tenant of fresh water, does not appear to 

 be migratory) is taken abundantly in the trans-TJral rivers tributary 

 to the Ob and Irtis, in the rivers flowing to the Jenisey, and in these 

 rivers themselves, as also in the Lena and in the stony rivers col- 

 lateral with it : in the lower regions of these rivers, towards the sea, 

 it is certainly not observed ; indeed even in Lake Baikal it does not 

 occur in great numbers. However, it grows to a remarkable size, 

 and in the Witim and Jenisey, towards Turuchansk, is said to have 

 weighed more than 80 lbs., although its ordinary size may vary 

 between 20 and 40 lbs. It enters also smaller and rapid rivers, as the 

 Liala, Tura, Uba, Tom, and others ; but beyond the Lena and its 

 collateral streams, and throughout the Eastern Ocean and in Kamts- 

 chatka it is not known. It has appeared of late in the upper river 

 Kama, coming from the alpine streams Jaiwa, Koswa, and others 

 communicating indirectly with the Kama." 



15. Salmo erythrinus. 



Saimo ervmnnus, Georgi, Reise im Russ. Reich, p. 186, tab. 1. fig. 1, 



and Beschreih. des Russ. Reichs, iii. p. 1935 ; L., Gm. p. 1368. 

 erythrseus, Pall. Zoogr. Ross.-As. iii. p. 349. 



A Charr from the alpine lake FreHcha, which by a river commu- 



