PEEFACE. 



The increasing popularity of the Marine Aquarium 

 demands a Handbook of Practical Instructions for 

 establishing and maintaining it, and I am probably 

 the most proper person to write it. Perhaps it 

 might have been sufficient to refer inquirers to 

 my volume on tlie subject ; but the price of that 

 work, arising mainly from the costliness of its 

 illustrations, puts it beyond the power of many 

 persons, who yet desire to keep marine animals. 

 The main portion of that volume is, moreover, 

 occupied with the habits and manners of the 

 tenants in an Aquarium. 



The concluding chapter of that work has formed 

 the ground of the present Handbook. The whole, 

 however, has been re-written, and copious additions 

 have been made, bringing it up to the present state 

 of our experience. The price at which it is issued 

 will, it is hoped, bring it within the reach of all. 



P. H. G. 



London, 



Septembei', 1S55. 



