CAPULUS. 47 



Locality. — There are two specimens in the Porter Collection from Pilton. 



Remarks. — One of Mr. Porter's specimens is a fine though slightly distorted 

 cast, and appears accurately to agree with the South Devon form. The second is 

 a mould, and is consequently doubtful, as the shape of the upper part of the whorl 

 is hidden. 



The English fossils closely resemble and are midway between Maurer's two 

 species, C. dormitans and G. Sainensis. These two species seem to differ only in 

 the length of the body-whorl, and the latter of them itself is seen to vary 

 considerably in that particular. If the three forms are identical, G. dormitans 

 would be its rightful name. It may, perhaps, be well for the present to leave 

 them unblended, as in the upper part of the inner side of the English specimens 

 is a strong longitudinal fold not seen in the German specimens, and we have not 

 at present sufficient material to show whether this is an accidental or permanent 

 character. 



3. Capulus compeessus, Ooldfuss, sp. Plate V, figs. 18, 18 a. 



1891. Capulus compeessus, Whidhorne. Dev. Faun., vol. i, p. 209, pi. xx, figs. 



9—11. 

 1895. PtATXCEEAS coMPEESSUir, Kayser. Ann. Soc. G-eol. Belg., vol. xxii, p. 184, 



pi. iv, figs. 1 — 3. 

 1895. — — Holzapfel. Abhandl. k. Preuss. Geol. Landes., 



n.s. pt. 16, p. 176, pi. xi, figs. 5, 6, 9 ; pi. xiv, 

 figs. 8 — 11 ; and pi. xv, figs. 1 — 3. 



Size. — Height 8 mm., width 17 mm., depth 17 ram. 



Localities. — In the Barnstaple Athenaeum are three casts from Top Orchard, 

 Croyde Bay, and Pilton respectively. 



Remarks. — These specimens are not very clear, being too much crushed and 

 obscured by matrix to be easily identified. In its present condition the best 

 preserved specimen so closely resembles G. compressus, especially as figured by 

 Kayser from Belgium, that it seems most probable that they are identical. 



Affinities. — From South Devon specimens of C. rostratus, Trenkner, it differs 

 by its less flatness, by the concavity of its lower side, and by indications of longi- 

 tudinal folds near the mouth. It is quite possible that, as Holzapfel asserts, G. 

 rostratus may prove to be only a variety of G. compressus ; but I can by no means 

 follow him in uniting such totally distinct shells as Diaphorostoma (= Platyo- 

 stoma) ? sigmoidale, &c., with the latter species. 



