156 MOLLUSCA FROM THE CRAG. 



2. CAPULUS OBLIQUUS. S. Wood. Tab. XVII, fig. 1, a b. 



CAPULUS OBLIQUUS. S. Wood. Catalogue 1842. 



C. Testa elongato-ovatd, obliqud, distortd, subdepressdj&vigatd, politd ; vertice involute, 

 later ali ; margini postico superposito. 



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 obliquity and smooth exterior. My specimens are 

 without a vestige of strise ; 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 rounded. 

 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 obliquity, 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. ft, partim sinuosus, fig. 3 a, b. 

 PATELLA MILITARIS. Mont. Test. Brit. p. 488, t. 13, fig. 11, 1803. 

 CAPULUS MILITARIS. Flem. Brit. An. p. 364, 1828. 

 RECURVATUS. S. Wood. Catalogue 1842. 

 PILEOPSIS MILITARIS. Thorpe. Marine Conch, p. 135, 1844. 

 Phil. En. MoU. 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 obliquely 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 irregular. 



Altitude, 1 inch ; length of base, |. 



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. 



