16 CYPRJ5A. 



however, more uniformity in the shape and colouring of 

 Arabica, which is more cylindrically ovate, with a flattened 

 base, and in which the Arabic marking is more conspicuous, 

 and occupies a larger part of the surface. The two species 

 may, therefore, usefully stand. Miss Saul has a very singu- 

 lar specimen, in which the characteristic marking of Arabica 

 is shown on one side of the ambulacrum, while on the other 

 that of reticulata dominates, showing that there is no abso- 

 lute line of demarcation between them, and that the two 

 specific names are only retainable for conventional use. 

 The monstrosity named eglantina, f. 282, 283, is from N. Ca- 

 ledonia, and is one of the singular series mentioned in the 

 introduction. The differences between scurra and Indica 

 are only those of degree. The spire being much produced, 

 and covered with the usual callus at the end of the columella, 

 causes the columellar extremity to exceed the outer lip in 

 length. 



45. madritiana, (f. 51, 52). — C. testa, subovata; dorso gib- 

 boso; terminis obtusis, emarginatis; lateribus ad dorsum 

 planulatis ; basi concava, ; lateribus basi dentibusque fusco- 

 cseruleo-nigricantibus ; interstitiis albidis ; labio postice si- 

 nuatim retrorso, acuto ; columella postice brevi, acuta ; den- 

 tibus validis, radiantibus, elongatis ; dorso pallide fusco, pur- 

 pureo nebulato, maculis pallidis rotundatis irregularibus 

 notato ; interstitiis castaneis. 



Note. — Eemarkably beautiful in the wavy colouring when 

 partially mature. 



46. aeabicula, (f. 38, 39). — C. testa ovato-acuminata, dorso 

 elevato subgibboso, lateribus depressis ; basi planulata, ; 

 dorso caerulescente, fusco creberrime subreticulatim picto ; 

 hiatu angusto, extremitatibus lateribusque purpureo-carneis, 

 lateribus guttis rotundis nigricantibus notatis ; apertura an- 

 gusta; dentibus acutis, radiantibus ; interstitiis profundis. 



Note. — This bright little shell, which is like a miniature 

 of reticulata, has the teeth very sharply undercut and ra- 

 diating. 



47. caput serpentis, Linn., (f. 72, 73). — C. testa ovato- 

 subquadrata, depressa, crassa, solida; dorso medio maculis 

 albis et interstitiis castaneis reticulato ; extremitatibus ob- 

 tusissimis, albicantibus ; lateribus depressis, castaneis ; basi 

 albicante; apertura rectiuscula; dentibus conspicuis, sub- 

 elongatis ; interstitiis profundis ; canalibus angustatis. 



