94 



UNIVALVES. — VOLUTA. 



Family 2. — Spire half 

 Cornicula — Horn-colour. 

 Schroeteri — Schroeter's. 

 Crenifera — Crenated. 

 Scabricula — Roughly-striated. 

 Ruffina — Reddish-yellow. 

 Vulpecula — Foxy. 

 Castellaris — Chequered. 

 Subdivisa — Subdivided. 

 Melongena — Fine-ribbed. 

 riicaria — Folded. 



the length of the shell. 

 Rugosa — Rugose. 

 Scutulata — Scutcheon. 

 Nigra — Black. 

 Casta — Brown-handed. 

 Serpentina — Serpent. 

 Digitalis — Fingered. 

 Episcopalis — Mitre. 

 Papalis — Pope. 

 Thiara — Thiara. 

 Coronata — 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. 

 Virgo — Virgin. 

 Filaris — Narrow. 

 Filosa — Threaded. 

 Clathrus — Cancellated. 

 Exasperata — Granulous. 

 Costata — Ribbed. 

 Granosa — Grained. 



Nodulosa — Nodulous. 

 Sanguisuga — Leech. 

 Polygona — Polygonal. 

 Tseniata — Ribbon. 

 Cruentata — Knotty-ribbed. 

 Turrita — Turreted. 

 Acus — Needle. 

 Abbatis — Abbot. 



Division VI. — Shell small, thick, strong, having the 



OUTER lip denticulated, AND RATHER ANGULAR, 



Mercatoria — Clouded. 

 Ziervogelii — Thick-lipped. 

 Rustica — Rustic. 



Torva — Rough. 



Mendicaria — Black and white. 



Nana — Dwarf. 



