UNIVALVES BULLA. 



81 



The Bulla, probably, derives its name from some of tiie 

 lesser species resembling a dew-drop, or bubble of water. 



BVLLA.— Dipper. 



Ovum — Poached Egg. 

 Volva — Weaver's Shuttle. 

 Birostris — False Weaver's Shuttle 

 Spelta — Oblong. 

 Verrucosa — Warted. 

 Gibbosa — Camel. 

 Naucum — Sea Nut. 

 *Aperta — Open. 

 *Hydatis — Paper. 

 *Ampulla — Lapwing's Egg. 

 *Lignaria — Wood. 

 * R egulbiensis — Produced. 

 Physis — Hair-streaked. 

 Amplustra— iZo^e- bud . 

 Ficus — Fig. 

 Rapa — Turnip. 

 Canaliculata — Canaliculated. 

 Conoidea — Conic. 

 *Fohtinalis — Fresh-water. 

 *Hypnorum — Slender. 

 Turrita — Turreted. 

 Gelatinosa — Gelatinous. 

 Terebellum — Auger. 

 Cyprsea — Cowry. 

 Virginea — Orange Flag. 

 Fasciata — Banded. 



S trigata — Yellow-streaked. 



S tria tula — Striated. 



Exarata — Grooved. 



Bifasciata — Double-banded. 



Ambigua — Ambiguous. 



Z ebra — Striped. 



Achatina — Agate. 



Hyalina — Glassy. 

 Ovata — Ovate. 

 Ferruginosa — Rust-spotted. 

 Velum— White-banded. 

 Vesica — Bladder. 

 *Cylindrica — Cylindrical. 

 Oliva — Olive. 

 Voluta — Volute. 

 Dominichensis — St. Domingo. 

 Purpurea — Purple-tnouthed. 

 Spreta — Mean. 

 Solida — Solid. 



Stercus-pulicum — Flea-spot. 

 Scabra — Rough. 

 Akera — Elastic. 

 Soluta — Unsealed. 

 Truncata — Truncated. 

 Carnea — Flesh-colored. 

 Patula — Patulous. 



