156 MOLLUSCA FROM THE CRAG. 



2. Capulus obliquus. S. TFood. Tab. XVII, fig. 1, a — d. 



Capulus OBLiauus. S. TFood. Catalogue 1842. 



C. Testa, elongaio-ovatci, ohliqiid, distortd, subdepressdjaviffatd, politd ; vertice involiito, 

 laterali; marffini postico superposifo. 



Shell with an elongato-ovate and oblique opening, externally smooth and glossy, 

 one side truncate, with a depressed and involute apex overhanging the posterior margin. 



Longest diameter of base, \\ inch. 



Locality. Red Crag, Walton Naze and Newbourne. 



Not a very rare shell, though large and rather tender. It appears to differ from 

 the preceding species in its greater obHquity and smooth exterior. My specimens are 

 without a vestige of striae ; but Crag shells are often so much altered in that respect as 

 not to be depended upon for such characters ; the right side, however, in this species 

 is always smaller and truncated, while the left is expanded, and more or less roimded. 

 In all my varieties of C. ungaricus I have not observed this regularity of form ; and I 

 have no specimens by which they can be connected ; it is nevertheless a doubtful 

 species. The great persistency in its obhquity, which may be seen in numerous 

 specimens, appears its greatest claim to specific distinction. It has probably lost a 

 portion of its outer coating. 



3. Capulus militaris. Mont. Tab. XVII, fig. 3, a—f. 



Capulus militaris. var. /3, partim sinuosus, fig. 3 a, h. 

 Patella militaris. Mont. Test. Brit. p. 488, t. 13, fig. 1 1, 1803. 

 Capulus militaeis. Flem. Brit. An. p. 364, 1828. 



— RECURVATUs. jS. TFood. Catalogue 1842. 

 Pileopsis militaris. Thorpe. Marine Conch, p. 135, 1844. 



— Phil. En. Moll. Sic. vol. ii, p. 92, 1844. 



C. Testa oblique-conicd, striatd, decussatd; vertice hamoso, revoluto, ad dextram 

 incurvato ; margini postico impendente ; aperturd elongato-ovatd, irregulari. 



Shell obhquely conical, striated, and decussated (?), with the vertex much reflected 

 and incurved ; volution inclining to the right ; apex overhanging the base of the shell, 

 with an elongate and ovate opening, but very in-egular. 



Altitude, 1 inch ; length of base, I. 



Locality. Cor. Crag, Sutton. 



Red Crag, Newbourn, Sutton, and Walton. Recent, British Seas. 



This is a very variable species. I have included in it only those specimens which 

 appear to have a small oblique volution, with the vertex always inclining to the right 

 when the shell is upon its base in its natural position, with the anterior margin forwards. 



