ON LAKES, POOLS, ETC. 151 



account we have of it. How far modern science may 

 be enabled to cope with the difficulty, I will not 

 pretend to say. The French pisciculturists, however, 

 who have much better opportunities of procuring it 

 from Germany than we have, do not seem to have yet 

 acclimatized it. Its voracity, however, need not be a 

 bar to its introduction, as it is more of a lake than 

 a river fish, and it might be placed in lakes, ponds, 

 and such waters as are already tenanted by pike and 

 perch, where it could do but little comparative harm, 

 and yet be a better fish than the pike or perch. Its 

 advent could hardly fail to be regarded favourably. 

 I was, some time since, applied to by the Acclimati- 

 zation Society to undertake the transportation of this 

 fish from Berlin, where it is plentiful, and has a good 

 reputation ; and, from what was stated at the time, it 

 would have appeared that the fish there in favour 

 was of a hardier nature than other authorities have 

 given it credit for. I gather, however, from Herr 

 Carl Voght's work, that there are two species of 

 Sanders, and possibly the other, which I have not 

 noticed, may be the fish referred to. It was not con- 

 venient to me to undertake the journey at the time, 

 and the project was for a period laid aside. 



I must now refer briefly to a class of fish found in 

 some of our lakes, and concerning which compara- 



