ARICIA. 



265 



Ex. C. talpa, Linncetis, pi. 28, fig. I. Shell, C. exan- 

 thema, Linnaeus, fig. 1, a. 



In Cyprcea proper, the shell is subcylindrical when 

 adult, varying, however, in form according to the age of 

 the animal ; in the very young it is thin, pellucid, and heli- 

 coid ; it afterwards becomes oliviform ; and finally, the 

 outer lip is inflexed and the inner lip dentate, as we ob- 

 serve the species in their adult condition. 



Species of Cyprcea. 



Argus, Limi. 

 asellus, Liiw. 

 carneola, Linn. 

 cervina, Lam. 

 cervinetta, Kien. 

 chrysalis, Kien. 

 Clara, Gask. 

 contaminata. Gray. 

 cylindrica, Born. 

 dama, Perry. 

 exanthema, Li7in. 

 exusta. Sow. 

 falcula, Kien. 

 felina, Gmel. 

 fimbriata, Gmel. 

 hirundo, Linn. 



interrupta, Gray. 

 irrorata, Soland. 

 Isabella, Linn. 

 leucodon, Brod. 

 lucida, Lavi. 

 microdon, Gray. 

 parvula, Phil. 

 pulchra, Gray. 

 quadrimaculata. Gray. 

 Reevei, Gray. 

 sordida. Lam. ■ 

 tabescens, Soland. 

 talpa, Li7in. 

 teres, Gmel. 

 testudinaria, Linn. 

 ursellus, Gmel. 



Genus ARICIA, Gray. 



Shell ovate, dorsally gibbous, flattened at the base, the 

 sides thickened and dilated, pohshed ; spire concealed ; 

 aperture narrow, linear ; inner hp greatly expanded and 

 callous, dentato-lirate ; outer lip dilated, flattened and 

 callous, dentato-lirate. 



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