CYPREA. 1 7 



Note. — Although this species resembles in general ap- 

 pearance the dwarf depressed variety of reticulata, it has 

 little affinity with it. The teeth are thick and undercut, 

 not superficial. 



48. mus, Linn., (f. 20, 30; var. Mcornis, f. 321).— C. 

 testa, ovato-subturbinata, ventricosa, lata, fusco-cinerea, 

 maculis saturatioribus omnino variegata, ad lineam dorsalem 

 castaneo-nigricante irregulariter maculata, marginibus sub- 

 expansis, extremitatibus subacuminatis approximatis ; basi 

 subcomplanata ; dentibus castaneis, columellas circa 12 ob- 

 tusis, labii circa 17 brevibus parvis distantibus, ultimo 

 linear i. 



49. leucostoma, Gash., (f. 36, 37). — C. testa, ovato-sub- 

 turbinata, ventricosa, lata, fusco-cinerea ; lateribus macu- 

 latis macula magna, irregulari castanea, circa lineam dorsa- 

 lem expansa; marginibus rotundis, crassis, extremitatibus 

 posterioribus latis incrassatis prominentibus, columellas al- 

 teram superanti, anticis angustis approximatis; basi rotunda, 

 albicante, margine interno labii nonnunquam obscure den- 

 tato ; columella, edentula. 



Note. — The broad, dark chestnut, dorsal marking is some- 

 times covered by the external enamel. 



Mus, leucostoma. — The posterior extremities of G. leu- 

 costoma are much thickened, the base rounded, the colu- 

 mella edentulate, the outer lip nearly so, — in these re- 

 spects differing from 0. mus. The usual variety of leuco- 

 stoma is remarkable for the patch of treacle-like colour on the 

 back. There are, however, specimens in which this is want- 

 ing. Mr. Hugh Owen possesses a beautiful shell, which is 

 of a uniform cream-colour, excepting as to the teeth, which 

 are of a delicate reddish-brown. The bituberculated variety 

 of wilts has received the name of hicornis. 



50. moneta, Linn., (f. 244-251 ; var. C. icterina, Lam., 

 testa, elongata, f. 248 ; var. C. Barthelemyi, Bern., f. 249— 

 251, and B. Noumeensis, Crosse (annulo conspicuo), testa, 

 basi plano-concava, extremitatibus productis). — C. testa 

 solida, subcompressa, quadrilaterali, flavida; dorso casruleo 

 fasciato ; basi concavo-depressa ; lateribus incrassatis, supra 

 frequenter tuberculatis, annulo aurantio nonnunquam cir- 

 cumscriptis ; terminis tumidis, plerumque latis obtusius- 

 culis, interdum productis acuminatis ; apertura angustata, 

 antice paulo expanso ; canalibus elongatis, edcntulis ; den- 



