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UNIVALVES. — NERITA. 



NERITA. — Nerite or Hoof-Shell. 



A. — Umbilicated. 

 Canrena — Tabby-cat. Cruentatsi— Red-spotted. 



Cancellata — Latticed. 

 ♦Glaucina — Livid. 

 Vitellus — Clouded-yellow. 

 Albumen — Yolk-qf-egg. 

 Mammilla — Breast. 

 Leucozonias — White-banded. 

 Spadicea — Chesnut-colored. 

 Rufa — Red. 

 Fulminea — Zigzag. 

 Stercus-muscarum — Fly-spot. 

 Orientalis — Eastern. 



Rugosa — Wriyikled. 

 Marochiensis — Marocco. 

 Sulcata — Grooved. 

 Aracnoidea — Spider's IVeb. 

 Vittata — Ribbon. 

 Melanostoma — Black-mouthed. 

 *Vd\Y\diu\di— Pallid. 

 Papilla — Nipple. 

 Clathrata — Grated. 

 Valvata — Flattish. 

 Islandica — Islandic. 



Affinis — Ochraceous. 



B. — Imperforated; lip toothless. 



Corona — Coronated. *Lacustris — Lake. 



Radula — Rough-ribbed. Magdalenae — Magdalene. 



Cornea — Horn. M arginata — Margined. 



*Fluviatilis — River. Dubia — Black-marked. 



*Littoralis — Strand. *Pellucida — Pellucid. 



^kVbd,— White. 



C. — Imperforated; lips toothed. 



Pulligera — Red. 

 Undulata — Undulated 

 A terima — Thick -opaque. 

 Larva — Broad-band. 

 Pupa — Black and white. 

 Bidens — Double-toothed. 



Viridis — Green. 

 Virgtnea — Guinea-hen. 

 Polita — Polished. 



Fe\oYonta.^Bleedi)ig-tooth. 

 Albicilla — Pimple-Up. 

 Histrio — Toothed-lip. 

 Plicata — Wrinkled-lip. 

 Grossa — Red-thrush. 

 Chamaeleon — Changeable. 

 Undata — Waved. 

 E xuvia — Deep-ridged. 

 Maxima — Great black Sf yellow. 



