94 UNIVALVES. VOLUTA. 



FAMILY 2. Spire half the length of the shell. 



Cornicula Horn-colour. Rugosa Rugose. 



Schroeteri Schroeter's. Scutulata Scutcheon. 



Crenifera Crenated. Nigra Slack. 



Scabricula Roughly-striated. Casta Brown- banded. 



Ruffina Reddish-yellow. Serpentina Serpent. 



Vulpecula Foxy. Digitalis Fingered. 



Castellans Chequered. Episcopalis Mitre. 



Subdivisa Subdivided. Papalis Pope. 



Melongena Fine-ribbed. Thiara Thiara. 



Plicaria Folded. Goronata Crown. 



Shell less than half an inch in length. 

 Maculosa Spotted. Discors Discordant. 



Biplicata Two-plaited. Striata Striated. 



Turricula Tower. Laevigata Smooth. 



Lineata White-lined. Ocellata Eyed. 



Sulcata Sulcated. Nasuta Black-spotted. 



Marmorea Marbled. 



FAMILY 3. Spire more than half the length of the shell. 



Acuminata Sharp-pointed. Nodulosa Nodulous. 



Virgo Virgin. Sanguisuga Leech. 



Filaris Narrow. Polygona Polygonal. 



Filosa Threaded. Tseniata Ribbon. 



Clathrus Cancellated. Cruentata Knotty-ribbed. 



Exasperata Granulous. Turrita Turreted. 



Costata Ribbed. Acus Needle. 



Granosa Grained. Abbatis Abbot. 



DIVISION VI. SHELL SMALL, THICK, STRONG, HAVING THE 



OUTER LIP DENTICULATED, AND RATHER ANGULAR. 



Mercatoria Clouded. Torva Rough. 



Ziervogelii Thick-lipped. Mendicaria Black and white. 



Rustica Rustic. Nana Dwarf. 



