66 BcauHful SJtcIIs. 



in tlie African and Indian Seas. Tin's is tlio T, 

 terehra, of naturalists; tlie first namo referring to 

 the turret sliape common to tlie genus^ and the 

 last being tlio Latin word for an auger, or piercer. 

 The Roseate Turritclla [T. rosea) is also sometimes 

 seen in collections; the beautiful rosy tint of tho 

 live shell changes to a dull rod or brown^ on the 

 death of the mollusk. 



TEOCnUS, OH TOP-SnELL. 



'^ Of the shelled Mollusca which the dredge 

 ever and anon brings up/^ saj^s Mr. Gosse, in his 

 dehghtful volume on the Aq^iiar'aimy or A'jua- 

 vivarium, as the glass tank in which living marine 

 animals and vegetables are kept, is called, from the 

 Latin aqua — vrater, and vivo — to live, " the TrocJci 

 are among the most conspicuous for beauty. The 

 chief glory of this genus is the richly-painted 

 internal surface of their shells, in which they are 

 not excelled by any even of the true margaritiferous 

 or pearly bivalves." 



Of this Trocliidce family, a few of the members 

 must be introduced to our readers; it is rather a 



