PULMONATA. 141 



shell is, however, narrower and slenderer, somewhat resembling M. hordeola in shape, 

 but more regularly fusiform. One of the specimens has the outer lip thickened and 

 margined, and it appears therefore, to have attained maturity ; but the posterior sinus 

 characteristic of this group and which is so strongly marked in M. bijido-plicata, is 

 wanting, and is represented by an obscure, scarcely perceptible channel at the suture. 

 The lip itself is not involute as in M. hordeola, but is simply thickened, and the front is 

 round, not flattened, as in M. bijido-plicata. 



The specimen figured is from Mr. D'Urban's cabinet. 



Size. — Axis, 2-10ths of an inch ; diameter, rather less than 1-1 Oth of an inch. 



Locality. — Barton, where it is scarce. 



Marginella dentifera. (Lamarck.) This species is recorded in the list of " The 

 Fossils of Bracklesham and Selsey," published in Mr. Dixon's ' Geology, 8fc, of Sussex,' 

 p. 107, on the authority of a specimen which formed part of my collection, but which, 

 unfortunately, has been broken : I am not aware that any other individual has been 

 found. The species is very rare in France ; and as Mr. Sowerby, by whom the list was 

 prepared, did not himself see the specimen, the identification cannot be relied on ; 

 I have therefore not included M. dentifera among the English eocene Marginellae. 



Section B. Spire concealed or nearly so. 

 No. 83. Marginella ovulata. Lamarck. Tab. XVIII, figs. 5 a — c. 



Marginella ovulata, Lamk. 1803. Ann. du Mus., vol. ii, p. 61 ; vol. vi, t. 44, fig. 10. 

 _ _ Roissy. 1804. Buff. Moll., vol. vi, p. 10, No. 6. 



— — Lamk. 1822. Hist, nat., vol. vii, p. 359, No 17. 



— — JDefr. 1823. Diet, des sci. nat., vol. xxix, p. 145. 



_ — Desk. 1824-37. Desc. des coq. foss., &c., vol. ii, p. 707, t. 94 



bis, figs. 27—29. 



_ _ Desk. 1830. Enc. me'th. (Vers), vol. ii, p. 416, No. 20. 



_ _ Bronn. 1831. Ital. Terti'argeb., p. 18, No. 52. 



_ _ Bronn. 1838. Leth. geog., p. 1106, t. 42, fig. 44. 



— — J. Sow. 1850. Dixon's GeoL, &c., of Sussex, p. 107, t. 7, fig. 38. 



— — ? Beyrich. 1853. Die Conchylien des Norddeutschen tert., vol. i, 



p. 49, t. 2, fig. 10a— b. 

 miliacea? Philippi. 1851. Palaeontographica (Tert. foss. Magd.), vol. i, p. 79, 

 No. 177. 

 Nee. — ovulata, Grat. 1838. Cat. Zoo!., &c. de la Gironde, p. 50, No 481. 



nee. — — Grat. 1845. Conchy, foss., &c., de l'Adour, t. 1, fig. 35. 



nee. — — Sism. 1847. Syn. meth., &c., Pedemont. foss., p. 46. 



M. testa ovato-oblongd, ad basin late emarginatd ; spird brevissimd : aperturd elongato- 



