UNIVALVES. — PATELLA. 



141 



Chlorosticta — Pigeon' s-throat. 

 Tigrina — Tiger. 

 Ornata — Adorned. 



Ulyssiponensis — Buckler. 

 Radiata — Radiated. 

 Lugubris — Black. 



Melanogramma — Black- ribbed. Vulgata — Common. 



Ferruginea — Rusty. 

 Crenata — Little-grey. 



Ccerulea — Blue. 

 Tuberculata — White-pimpled. 



Sanguinolenta — Rose-streaked. Cochlear — Horse-shoe. 

 Division IIL — Shell with the summit perforated. 



Noachina — Perforated. 

 VviSixiU— Doubtful. 

 Graeca — Cancellated. 

 Atricapilla — Black-ring. 

 Nodosa — Tuberculated. 

 Perforata — Partridge. 

 C a ffra — African . 



Pileolus — Open-cap. 

 Scutellum — Scutcheon. 

 Picta — Painted. 

 Nimbosa — Scaly-ribbed. 

 Nubecula — Variegated. 

 Porphyrozonias — Porphyry. 

 Macroschisma — Key-hole. 



Division IV. — Shell with the 

 *Ungarica — Fool's-cap. 

 *Militaris — Hooked. 

 *Antiquata — Antiquated. 

 Cochleata — White-ridged. 

 Calyptra — Helmet. 

 *Intorta — Inclining. 

 Cassida — Lentil-seed. 

 Tranquebarica — Brilliant. 



Oblonga- 



summit pointed and recurved. 



Mammillaris — Nipple. 



Leucopleura — Small-rayed. 



Tricarinata — Three-keeled. 



Pectinata — Spine d. 



Fusco-lutea — Yellowish- brown. 



Lutea — Yellow. 



Perversa — Reverse-tipp'd. 



Lacustris — Lake. 

 -Oblong. 



Division V. — Shell with a marginal fissure. 

 Tissura — Slit. Incisa — Reticulated-slit. 



Fissurata — Rose-colour' d. 



Division VL — Shell with an internal appendage at the summit. 

 Equestris — Cup-8f- saucer. *Sinensis — Chinese-bonnet. 



Neptuni — Neptune' s-cap. Auriculata — Ear-shap'd. 



Tectum — Chinese-roof Duplicala — Double. 



Division VIL — Shell with an internal transverse 2)artitio7i, 

 Trochiformis — Trochus-shap'd. Trochoides — Wave-ribbed. 



