﻿CAPULUS. 213 



8. Capulus Ussheri, sp. n. PI. XXI, figs. 2, 2 a, 2 b. 



? 1840. Pileopsis vetusta, Soio. Geol. Trans., ser. 2, vol. v, pt. 3, pi. lvii, fig. 15. 



Description. — Shell of moderate size, depressed, trigonal. Spire very rapidly 

 increasing, very small, consisting of less than a volution. Apex small, much 

 recurved. Body-whorl in section narrow and flat above, curving suddenly to the 

 back which is broad and gently convex, and rounding in more rapidly below. 

 Horizontal curvature of the body-whorl small, about one-fifth of a circle. Surface 

 slightly uneven, covered with close, irregular, slightly sinuous growth-lines, which 

 are crossed by multitudinous, microscopical, spiral striae. Mouth very large and 

 wide ; peristome apparently slightly sinuous. 



Size. — Width 27 mm., depth about 13 mm., height 22 mm. 



Locality. — Wolborough. A single specimen in Mr. Vicary's Collection. 



Remarks. — This specimen was labelled by Salter " Acroculia not vetusta," and 

 it certainly does not belong to Sowerby's original species, 1 though it may be the 

 same as the shell afterwards figured by him in the ' Geol. Trans.' Its mouth and 

 spire are unfortunately much obscured by the matrix, so that the above description 

 is in some degree tentative, and it is very difficult to make out its true form or 

 relationship. It appears, however, to be so different from any of the other speci- 

 mens which I have examined, that I am obliged, at least for the present, to regard 

 it as distinct. As the base-line cannot be made out, it is impossible to decide its 

 lateral elevation, and therefore the position of the apex with regard to the mouth. 

 It may perhaps be best compared with the specimen of Capulus cordatus in the 

 Museum of Practical Geology, from which, however, it differs in so many points 

 that I do not think it could under any circumstances be regarded as identical. It 

 differs from Capulus columbinus in being less globose, and in having a more 

 tapering, elevated, and apparently free apex ; and from C. puellaris in being flatter, 

 wider, and much more rapidly tapering. 



9. Capulus uncinatus, F. A. Romer? PI. XXI, figs. 3, 3 a. 



? 1852. Capulus uncinatus, F. A. Romer. Beitr., pt. 2, p. 101, pi. xv, fig. 15. 

 1858. Oiebel. Sil. Faun. Unterharz., p. 20, pi. iii, figs. 1G ?, 



19, 20. 

 1878. — — Kayser. Abhandl. Geol. Specialk. Preuss., Band ii, 



pt. 4, p. 92, pi. xv, figs. 1—3, 4 ?, 5. 



Description. — Shell rather small, depressed, transversely conical. Apex minute, 

 much recurved, contiguous, situated nearly in the median line of the shell, and 

 1 1829, Sowerby, ' Min. Concb.,' vol. vi. p. 223, pi. dcvii, figs. 1—3. 



