Monograph on the Cj/prceidce, by Mr. Gray. 149 



convex, uppermost part chesnut brown, becoming gradually paler 

 lurid brown, till it is nearly white at the aperture, generally crack- 

 ed; base convex, shelving towards the edge and aperture ; aper- 

 ture rather broad ; teeth large, pale, whitish brown ; columella 

 plaited, the front rather convex ; spine perfectly hid ; inside 

 white; axis 2, diameter ±± of an inch. 



This shell is very similar to the preceding, which is easily dis- 

 tinguished from it by its smaller size, the more angular extended 

 sandy upper part of the margin, the white base near the mouth, 

 and the more concave front of the columella. 



In these three species, perhaps the back which exhibits the outer 

 bands should be considered as a very wide dorsal band forming a 

 lanceolate spot ; as I have not seen any other dorsal line, and the 

 chesnut part of the true outer coat, and below that the thickened 

 margin. 



22. Cyprcea gibbosa. 



Testa ovalo-ovata, subventricosa alba; lateribus incrassatis rotun- 

 datis, posteriore sub-producta, dentibus obtusis ; columella antice 

 profunde maxime excavatis sub-plicatis. 



Fossil, from Bordeaux. Mus. Sowerb. 



Shell oval ovate, rather ventricose, white ; spire conical covered, 

 sides thickened rounded, gibbous on the upper part of the back 

 margin of the outer lip ; base convex; aperture dilated and con- 

 cave in front ; the teeth distinct, blunt, nearly even ; the front of 

 the columella very deeply impressed, plaited, edge of the inner- 

 most part toothed; axis li, diameter ±%. 



23. Cyprcea diluviana. 



Testa ovalo-ovata, ventricosa, alba; lateribus sub-incrassatis 

 rotundatis; dentibus obtusis; columella laevi, antice sub-concava, 

 excavata. 



/3. minor, axis •!§, diameter -L. 



Cypraea fabagina, Lamarck. Ann. Mus. xvi. 106. Hist. 406. 



Fossil,, from Bordeaux, Mus. Sowerb. /3. Mus. De France. 



Shell sub oval ovate, ventricose white ; the spire conical cover- 

 ed, the sides rather thickened rounded, even, slightly produced 

 and margined at the anterior extremity ; base convex, aperture 



