ANIMALS FOE. 59 



CHAPTER VI. 



OX THE MAKINE AQUAVIVAKIUM. 



MR. G-OSSE'S excellent little book on the Salt- 

 water Vivary renders it unnecessary that we should 

 treat at any length on this department of our 

 subject. The principles to be acted on are the 

 same ; and those who have carefully read and 

 thought over our remarks up to this point will be 

 already prepared to construct a marine Aqua- 

 vivarium. There is no doubt that the marine col- 

 lection is more difficult to manage, and requires a 

 nicer attention to details ; at the same time, it is 

 unquestionably more interesting. The sea presents 

 a much greater variety of forms of life than the 

 rivers and fresh waters. These creatures illustrate 

 more fully the great laws that govern the forms of 

 animal life, and no due conception can be formed 

 of the beauty, variety, and unity of design in the 

 structure of the animal kingdom unless they are 

 studied ; we recommend, then, most strongly, at- 

 tempts at the maintenance of a marine Aqua- 

 vivarium. They may be started and kept going 

 most successfully at the sea-side ; but we would 

 warn all our readers of the difficulty of moving 

 them. Sea plants and creatures may, however, be 

 conveniently carried in wide-mouthed jars, such as 

 pickle-jars ; and sea water may be carried in stone 

 bottles. It is very much less trouble, and almost 

 less expense, to buy both creatures and sea water at 



