OS, GLIMPSES BENEATH THE WATEES. 



alarmed. These little creatures are exceedingly 

 voracious, and when one was observed by Mr. 

 Gosse to seize another of its own species, the 

 victim shot out its defence of dark black fluid. 



Some of the TrocJius tribe of shells look pretty 

 in an Aquarium, but at present their treatment is 

 so imperfectly understood, that they do not seem 

 to do well. The specimens can, however, be re- 

 newed as required. 



Trochus ziziphimts^ the pearly TrocJius^ the 

 animal of which is of a rich orange colour striped 

 with black, moves freely about, and forms a very 

 attractive object. The animal of T. gramilatm 

 is larger and handsomer, but shy, and displays 

 little activity in confinement. The small Trochus^ 

 T. cinerarius^ if placed in an Aquarium, may be 

 observed rasping down the minute Confervse that 

 grow on the inside of the glass ; and the curious 

 method of the operation, and the singular instru- 

 ments with which it is performed, may be observed 

 by the aid of a small pocket lens. 



Limpets — those curious bonnet-shells, as they 

 are termed in some places, which are found in the 

 form of a flattened and inverted funnel, adhering 

 closely to the flat rocks of the sea- shore in all the 

 European seas — are more curious than they appear 



81 G 



