258 CRUSTACEA, ECHINODERMS, ETC. 



at Hamburg, Brighton, and the Crystal Palace, and the 

 tanks were then crowded with transparent, leaf-like 

 young, which, before then, were regarded as a distinct 

 species, and called the " glass crab " {Phyllosomd}. 

 The common lobster (Homarus vulgaris) is an aqua- 

 rium favourite, and although its colours are not so 

 bright as those of the foregoing, the plum-tinted 

 carapace is not without beauty ; whilst its graceful 

 motions in walking and climbing by means of its 

 slender feet, and swimming either by the aid of the 



*~A a 



Embryo of common Lobster, magnified 20 diameters. 



" swimmerets " arranged underneath the abdomen as 

 so many fringed plates, or by one flap of the powerful 

 expanded, fan-like divisions of the tail, give a good 

 deal of animation to a tank. When several of these 



