UNIVALVES. — HALIOTIS. 13.: 



Pupa — Black-and-white. Turrita — Tnrretcd. 



Bidens — Double- tooth' d. Piperina — Triangular-spotted. 



FJavescens — Yellowish. Laws.— Broad-band. 



Viridis — Green. Ascensionis — Ascension. 



Virginea — Guinea-foivl. Malaccensis — Malacca. 



Hieroglyphica — Hieroglyphic. 



Family 2. — With both lips toothed or crenated. 

 Polita — Smooth. Lineata — Lined. 



Peloronta — Bleeding-tooth. Versicolor — Many-colonr'd. 



Maxima — Great. Pica — Magpie. 



Histrio — Harlequin. Stella — Star. 



Tessellata — Tessellated. 



Family 3. — With the inner lip toothed and tvrinkled. 

 Atrata — Smooth-black. Flammea — Flame. 



Nigerrima — Black. Grossa — Red- thrush. 



Antillarum — Wrinkle-lip. Undulata — Thin-wav'd. 



Plicata — Horse-tooth. Quadricolor — Four-colour' d. 



Family 4. — With the inner lip toothed and tuberculated. 

 Albicilla — Pimple lip. Exuvia — Exuvia. 



VyxlgmQ-ns—* Lightning. 



Family 5. — With the inner lip toothed, wrinkled, and tuber- 

 culated. 

 Plexa — Thrush. Chamasleon — Chameleon. 



Costata — Ribbed. Undata — Waved. 



HALIOTIS.— Sea-Ear or Ear-Shell. 



Animal — a Limax: Shell univalve, dilated, ear-shaped, 

 with a longitudinal row of orifices along the surface; 

 spire lateral, and nearly concealed. 

 OF this beautiful genus there are but twenty-two species ; 



and their general form and appearance are so similar, that 



