284 



Shells with the right lip wrinkled, or plaited. 

 Ovula oviformis Ovula lactea 



angulosa carnea 



verrucosa triticea 



Ovula hordacea. 



Shells with the right lip smooth. 

 Ovula gibbosa Ovula spelta 



acicularis birostris 



Ovula volva. 

 [There are also two fossil species.} 



CYPrLEA. 

 cypkjea mappa. — Linn. 

 Martini, 1, tab. 25 < t fig. 245, 246. 

 Mawe's Linn. pi. 21,/. 3. 

 This very numerous and generally well known fami- 

 ly presents the most consistent uniformity between its 

 species, and with the exception of the Ovula verrucosa, 

 no other shell can be mistaken as belonging to it. It is, 

 therefore, sufficient to give only Lamarck's generic de- 



