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UNIVALVES. — PATELLA. 



The Patellae are usually found adhering hy their base to 

 rocks, stones, fuci, and other marine substances, from which 

 they are with much difficulty removed. They inhabit the 

 Indian, Southern, European, Northern, and Mediterranean 

 seas ; the American and Indian islands ; the Atlantic, and 

 the shores of China, Greenland, and Iceland. 



The Patellae derive their name from their resemblance 

 to a little dish or bason reversed. 



PATELLA— Zm^jei. 



Division L — Shell with the summit obtuse, and the margin entire' 



*Pellucida — Pellucid. 

 ♦Lsevis — Smooth. 

 Radians — Grey-mottled. 

 R Ota — Roundish. 

 Testudinaria — Tortoise-shell. 

 *Clealandi — Clealand's. 

 Testudinalis — Small-tortoise- i 

 Compressa — Flat-sided. 

 Mytiliformis — Muscle. 

 Afra — African. 

 Rustica — Narrow ribbed. 

 Jamaicensis — Jamaica. 

 Stellifera — Starred. 

 F usca — Sugar- loaf. 

 Areolata — Pyramidal. 



F lam mea — Agate. 

 Indica — Indian. 

 Vitellina — Yellow. 

 Laevigata — White-tipped. 

 Surinamensis — Surinam. 

 Punctulata — Dotted. 

 Notata — Wheat-sheaf. 

 Cruciata — White-cross. 

 Reticulata — Reticulated. 

 Caeca — White-bordered. 

 \irg\nea.— Purple-rayed. 

 Tessellata — Tessellated. 

 Fulva — Orange-tawny. 

 Ambigua — ■ White-duck' s-bill. 

 IJxnheWatSi— Parasol. 



Division IL — Shell with the margin angular, or irregularly 

 toothed. 



Laciniosa — White-eyed. 

 Plicata — Plaited. 

 Monopis — Chesnut-streaked. 

 Saccharina — Star. 

 Angulosa — Angular. 

 Repanda — Small-sun. 

 Tenuis — Thin-amber. 



Margaritacea — Great-sun. 

 Barbara — Toothed. 

 Cypria — White-ribbed. 

 Oculus-capri — Goat's-eye. 

 Pentagona — Five-angled. 

 Granularis — White-grained. 

 Granatina — Garnet. 



