242 Transplantatio7i of Fish from 



lates to the indifference whicli sea-fish possess as to the quality 

 of the water. Being embanked from the sea, and receiving an 

 insufficient supply of fresh water in summer, it varies, so that while 

 it is perfectly fresh in winter, it is nearly salt in very dry 

 weather, and brackish in various degrees at intermediate periods. 

 Here also, it is remarkable, that while the larger fishes have been 

 placed there, many of the smaller ones, which formerly showed 

 no such desire, have introduced themselves through crevices in 

 the sea-wall, and that it is, in particular, crowded with crabs and 

 prawns. 



It is now necessary to subjoin a list of the fishes which, be- 

 longing naturally to the sea, have been found to live in fresh 

 waters. Some of these have been forcibly introduced, others 

 seek it for themselves. If the list is still limited, it is because 

 the rest have not been tried ; for no fish on which the experi- 

 ment has been properly tried, has failed. When they have 

 failed, it is because they were previously injured, or nearly killed, 

 in the taking or the transportation. The cross indicates those 

 which have been forcibly naturalized in Mr. Arnold's or some 

 other pond. 



