Some new Upper Greensand Gasteropods. 293 



numerous, narrow, and wide apart. Spire elevated, rather 

 more than half the length of the shell, composed of four 

 whorls. Whorls a little rounded ; body-whorl slightly in- 

 flated. Mouth an elongated ellipse, not unlike the outline of 

 a grain of wheat. Columella marked on its lower portion 

 with two very prominent angular folds, which are wide apart ; 

 the upper one is near the middle of the columellar lip. 



This species is most closely related to T. affinis (Sow.), but 

 differs from it in the folds on the columella, and more elongated 

 form. The sulcations also appear to be more numerous. 



Rare. Coll. J. Carter, Esq. ; University ; Mr. W. Farren. 



Cinulia ventricosa. 



Shell thin, subglobular, as wide as high, consisting of four 

 whorls. Spire nearly one-third the length of the shell. 

 Whorls rapidly enlarging, ventricose, slightly flattened on 

 the upper part from the suture outwards. Body-whorl orna- 

 mented with about twenty-five faint longitudinal striae, which 

 are crossed by more than twenty wide sulcations. Base 

 round. Mouth large, suboval, angular posteriorly, more than 

 half as wide as long. Lip greatly thickened by an internal 

 varix, which is marked with numerous (about twenty-five) 

 little teeth. The columella has on its anterior end two very 

 prominent teeth, of which the more anterior is the longer. On 

 the left-hand side of the mouth the body-whorl is a little flat- 

 tened on its middle part, as though by internal thickening, 

 and on the lower part near to the teeth it is slightly inflated. 



This species is nearly related to C. Hugardiana (D'Orb.), but 

 is distinguished by the two columellar teeth, wider mouth, lon- 

 gitudinal strige, fewer spiral striae, &c. It more closely approaches 

 C. Prevosti ij)' A.vc\\.) , but is distinguished by the more globular 

 form, wider mouth, and longitudinal striae. 



Not rare. Coll. University ; Mr. W. Farren ; J. Carter, Esq. 



Stomatodon. 



Shell smooth, few-whorled, moderately elongated, inflated, not 

 umbilicated. Aperture entire, semicircular, rounded ante- 

 riorly. Outer lip periodically thickened internally. Colu- 

 mella with prominent tooth-like folds. 



This genus belongs to the Tornatellidae, and should be placed 

 near to Cinulia. 



Stomatodon politus. PI. XI. fig. 22. 



Shell smooth, polished, elongated, inflated ; not umbilicated. 

 Spire half the length of the shell, consisting of four whorls, 



