1 16 UNIVALVES. — TROCHUS. 



*Obliquatus — Umbilicated. Solaris — Sun. 



Cinerarias — Ashy-colour' d. Inermis — Short-spined. 



Neritoideus — Reddish-colour'' d. Imperialis — Imperial. 



Albidus — White. Conchyliophorus — Carrier. 



Vittatus — Ribbon. Tectum — Arch-Upp'd. 



Divaricatus — Divaricated. Pumilio — Dwarf. 



Fuscatus — Brown. *Terrestris — Land. 



Umbilicaris — Obliquely-rayed. Bidens — Double-tooth'' d. 



Cinereus — Cinereous. Fragilis — Brittle. 



Fasciatus — Banded. Carinatus — Keeled. 



Planus — Flat. Flumineus — River. 



Family 2. — With pillar toothed or plaited, and umbilicus 

 smooth. 

 Maculatus — Spotted. Cruciatus — Cross-rayed. 



Alveare — Bee-hive. Modulus — Keel-whirV d. 



Tentorium — Pavilion. Declivis — Egyptian. 



Agrestis — Rustic. Viridulus — Necklace-grained. 



Niger — Black. Perlatus — Pearly. 



Family 3. — With pillar smooth, and umbilicus toothed or cre- 



nated. 

 Cylindraceus — Sub-conical. Carneus — Flesh-colour' d. 



Areola — Red square-spotted. 



Family 4. — With pillar and umbilicus crenated. 

 Pharaonis — Strawberry. Guineensis — Guinea. 



Corallinus — Coral-head. Urbanus — Purple-striped. 



Family 5. — Shell depressed, with the umbilicus large, pervious^ 

 and crenated, in which the course of the whirls is strongly 

 marked. 



Perspectivus — Staircase. Hybridus — Mongrel. 



Perspectivunculus — Small-do. Stramineus — Straiv-colour'd. 



Infundibuliformis — Fu7inel- Indicus — Indian, 



formed. 



Division II. — Shell imperforate, erect. 

 Family 1. — With the pillar sinooih. 

 Grandinatus — Studded. Tuber — Large-moitled. 



