GASTEROPODA. 173 



1. Bulla lignaria. Linn. Tab. XXI, fig. 8, a — b. 



Bulla ligxakia. Linn. Syst. Nat. p. 1184, No. 3/9, 1766. 



— Donovan. Brit. Shell, t. 27, 1807. 



— Mont. Test. Brit. p. 205, 1803. 

 Scaphander lignarius. Montf. Conch. Syst. p. 334, 1810. 



— lignaria. Leach. Moll. 1820. 



— lignarius. Loven. Ind. Moll. Scan. p. 10, 1846. 

 Bulla lignaria. Brown. Illust. Brit. Conch, pi. 38, fig. 23-24, 1827. 



— Broc. Conch, foss. Subapenn. t. 2, p. 274. 



— Dujardin. Mem. Soc. Ge'ol. de France, torn. 11, pi. 2, p. 275, 1837. 



— Phil. En. Moll. Sic. vol. ii, p. 95, 1844. 



— S. Wood. Illust. Mag. Nat. Hist. pi. 7, fig. 14, 1839. 



— Nyst. Coq. foss. de Belg. p. 452, pi. 39, fig. 5, 1844. 



Enc. Method, pi. 359, fig. 3, A.B. 



B. Testa ovatd, tenui, laxe convolutd, versus spirant attenuatd, transversim striata, 

 spird truncatd, depressd ; labro arcuato ; sine umbilico. 



Shell ovate and thin, slightly convolute, rather contracted towards the spire, 

 with a large expanded aperture, ovate, rounded at the lower part ; transversely or 

 spirally striated upon the exterior ; strias distant, impressed ; vertex truncate, with 

 a slightly depressed spire. 



Axis, 1 inch. 



Locality. Cor. Crag, Sutton. 



Red Crag, Sutton. Recent, British Seas and Mediterranean. 



I have been able to obtain only a few specimens of this shell, which appears to 

 be identical with the well-known recent British species. M. Nyst, in the work 

 above referred to, has given as a synonym, B. lignaria, Deshayes (Coq. foss. des 

 Env. de Paris, pi. 5, f. 4-6), thereby considering this as an Eocene species. I am 

 not acquainted with the Paris basin-shell, but a species somewhat resembling this, 

 from Barton, in the cabinet of Mr. Edwards, and which I imagine to be the same, 

 differs in several particulars ; it is more elongate, less expanded, more closely and 

 regularly striated, with the stria? beautifully punctured, and is, I think, a distinct 

 species, probably Bulla Fortisii, Brongniart. 



2 . Bulla conulus. Desk. Tab. XXI, fig. 2, a — c. 



Bulla conulus. Desh. Coq. foss. des Env. de Par. p. 41, pi. 5, fig. 34-36, 1837. 



— — Grat. Foss. de Bord. p. 51, pi. 3, fig. 4-5, 1838. 



— angistoma (?). Grat. - p. 52, fig. 6-7. 



— ovulata (?). Dubois. Foss. de Volhyn. p. 49, pi. 1, fig. 13-14, 1831. 



— conulus. S. Wood. Illust. in Mag. Nat. Hist. pi. 7, fig. 6, 1839. 



B. Testa minutd, ovato-conicd, politd ; transversim tenuissime striata ; spird occulta ; 

 vertice infundibuliformi; aperturd superne angustissimd ; basi dilatatd ; columella inf erne 

 obsolete uniplicatd. 



Shell small, ovato-conical, covered externally with fine and distant transverse 



