FISH AND CRUSTACEA FOR MARINE AQUARIUM. 115 



own species, as well as all other fish sufficiently timid or 

 amiable to accommodate his appetite. We cannot conn- 

 tenance such a savage The Pipefish ( Syngnathus 

 acus) would not prove an improper member of your 

 sea-cabinet. 



Hermit cr3ih—{Fagurus Longicarpus.') 



Crustacea. — The little Hermit Crab {Pagurus longicar- 

 pus) may be discovered in great abundance upon all our 

 coasts, and merits a good place in the variety of subaque- 

 ous life which constitutes a true Aquarium. He is a pug- 

 nacious individual, however, and when two or more are 

 placed in one compartment, it would be judicious to select 

 them as nearly as possible of one size and physique. They 

 travel all over the tank, and when they meet invariably 

 indulge in a savage encounter, until one, convinced of his 

 inferiority, abandons the contest, and hastens out of the 

 way on the approach of his antagonist. The Hermit Crab 

 seldom inhabits a shell of his own. He may be found in 

 almost every kind of shell whatever. He is not at all 



