CYPE^A.— Plate XX. 



The wood-louse Cowrey. SheU globosely ovate, vei-y 

 much inflated, riglit side thickened ; ornamented with 

 bifurcated and wrmkled raised striae or vesicles, with 

 a smooth central dorsal impression ; aperture large, 

 very wide ; columella smooth, back pinkish flesh- 

 colour, base whitish. 

 Lamaeck, Anim. sans vert. (Deshayes' edit.) vol. x. 

 p. 541. 



Cypraa {Trivia) aperta, Gray. 

 Hob. Cape of Good Hope. 



Neither of the figures in Lister and Martini to which 

 Lamarck refers for the illustration of this species can be 

 possibly identified with his description. The former, as 

 M. Deshayes has akeady shown, represents the C. radians, 

 and there is very little doubt but that the latter is intended 

 for the same species, to which the terms " globosa, inflata, 

 albido-carnea, immaculata, ventre convexa, apertm'a latis- 

 sima " do not apply. They apply on the other hand with 

 such peculiar accuracy to the species under consideration, 

 it is strange the confusion has never been detected by 

 English writers on the genus. 



Species 112. (Mus. Cuming.) 



Cypr^a ovula. Cypr. testa, ovato-ventricosd, injlatd, Mro 

 dextro incrassato ; midique lavigatd, dentibm interi- 

 oribus minimis, aperturi latissimd ; nived, ant rosacea 

 pallide tinctd. 



The oval Cowrey. Shell ovately ventricose, inflated, 

 right lip thickened ; smooth throughout, inner teeth 

 very small, apertm'e very wide; snowy white, or faintly 

 tinged with pink. 



Lamarck, Anim. sans vert. (Deshayes' edit.) vol. x. p. 533. 

 Cypreea carnea var. Gray. 



Hab. ? 



Cj/praa omilata was the name fii'st given to this shell by 

 Lamarck, but finding, probably, that it had been abeady 

 used by Gmelin in reference to the C. cermcs, he dropped 

 the last syllable for the sake of distinction, though both 

 terms are sufficiently corrupt. The species is a very 

 characteristic one, and may be easily recognised by its 

 smooth s\ufaee. 



