﻿208 DEVONIAN FAUNA. 



the present shell proving to be specifically distinct. It appears to be the best 

 course to place it, for the present, under the heading C. rostratus, Trenkner, leaving 

 it to be decided whether it should be differently treated when more and better 

 specimens are found. 



Capulus rostratus, Trenkn., 1 as described by him and as given by Clarke, 2 is a 

 smaller form with a less distant and recurved apex and no distinct signs of any 

 basal concavity, but it comes so close that there is a probability that the same 

 species may be intended by the very rough figure of the earlier author. 



The next is the only accompanying species to which it could be united, 

 as its great flatness and other characters widely separate it from all the other 

 shapes which occur in the present localities. 



Affinities. — Pileopsis compressa, Goldfuss, 3 is exceedingly like the exposed side 

 of Mr. Vicary's large specimen, but as described by him and F. A. Romer 4 it 

 appears to want the deep basal concavity seen in the other specimens of the 

 English shell. As given by Barrois, 5 also, it is very like Mr. Vicary's specimen. 

 No basal concavity is, however, noticed by him, the spire is smaller, and there is 

 no notice of any spiral markings. Hence, though coming so close, I do not feel 

 justified in regarding it as identical. 



Capulus gracilis, Sandberger, seems to come very near it, though the view 

 given by Sandberger does not render a comparison with our shells very easy, 

 and his description does not help much. It differs somewhat in the elliptic curve 

 of its spire, which is much greater, and there is no sign of the depression on the 

 lower side. 



4. Capulus compeessus, Goldfuss, sp. PI. XX, figs. 9 — 11. 



1832. Pileopsis compeessa, Goldfuss. In De la Beche's Handbook (German 



edition), p. 531. 

 ? 1841. Acboculia vetusta, Phillips (pars). Pal. Foss., pi. xxxvi, fig. 169 c 



(only). 



1843. — compressa, F. A. Burner. Harz., p. 26, pi. xii, fig. 34. 



1844. Pileopsis compeessa, Goldf. Petref ., vol. iii, p. 9, pi. clxvii, figs. 18 a — c. 

 1846. Aceoculia pro;eva, Eichwald. Geogn. Buss., p. 384. 



1855. Capulus compeessus, de Verneuil. Bull. Soc. Geol. Fr., vol. xii, p. 1001, 



pi. xxix, fig. 1. 



1 1867, Trenkner, ' Paliiont. Novit.,' pt. 1, p. 12, pi. i, fig. 22. 



2 1884, Clarke, ' Neues Jahrb. f. Min.,' Beil.-Band iii, p. 362, pi. v, figs. 10, 11. 



3 1844, Goldfuss, ' Petref. Germ.,' vol. iii, p. 10, pi. clxvii, figs. 18 a — c. 



4 1843, P. A. Eomer, ' Harz.,' p. 26, pi. xii, fig. 34. 



5 1882, Barrois, ' Mora. Soc. Geol. Nord,' pi. ii, No. 1, p. 281 ; pi. xiii, figs. 2 a, b. 



