178 MOLLUSCA FROM THE CRAG. 



8. Bulla Lajonkaireana. Bast. Tab. XXI, fig. 5, a — c. 



Bullina Lajonkaireana. Bast.De&c. Geol.'du Bassin. Tert. du S.O. de la France, pi. 1, fig. 25, 1825. 



Grat. Not. sur la Fam. des Bull. p. 64, pi. 3, fig. 45-46, 1838. 

 Bulla spieata. Dubois, de Montp. Foss. de Volhyn. pi. 1, fig. 11-12, 1831. 



TEKEBELLATA. - - - - pi. 1, fig. 8-9. 



CLANDESTINA. - - - pi. 1, fig. 19-21. 



— mammillata. Phil. En. Moll. Sic. vol. 1, p. 122, t. 7, fig. 20, 1836. 



— Lajonkaireana. Desk 2d edit. Lam. Hist, des An. s. Vert. torn, vii, p. 678, 1836. 



— — Bujard. Mem. Soc. Geol. de France, torn, ii, pt. 2, p. 237, 1837. 



— olivula. S. Wood. Illust. Mag. Nat. Hist. p. 365, pi. 7, fig. 11, 1839. 



— Lajonkaireana. S. Wood. Catalogue 1842. 



B. Testa pusilld, cylindricd, laevigata ; spird brevi, apice obtuso ; suturis subcanali- 

 culatis ; aperturd super m angustd, linearis in/erne dilatatd; plied ad basim columella vix 

 distinct a. , 



Shell minute, cylindrical, and smooth, with a conspicuous, slightly elevated 

 spire, and mammilated apex ; suture distinct, subcanaliculated ; aperture linear, 

 narrow at the upper part and dilated below, with an obscure fold upon the columella. 



Axis, y of an inch. 



Locality. Cor. Crag, Sutton. Recent, Mediterranean. 



My cabinet contains about twenty specimens of this species, but unfortunately 

 all are in bad condition ; there is, however, I think, no doubt about its identity. 

 The lower part of our shell is rather narrower than the upper. It appears subject 

 to a considerable variation in the amount of elevation of the spire, which would most 

 probably produce a like variation in its cylindrical character. All my specimens 

 are perfectly smooth, excepting the lines of growth. 



9. Bulla nana. S. Wood. Tab. XXI, fig. 13, a—b. 



Bulla nana. <S. Wood. Catalogue in An. and Mag. Nat. Hist. p. 461, pi. 5, fig. 1. 



B, Testa pusilld, exigud, laevigata, hyalind ; spird elevatd ; apice obtusiusculo ; anfrac- 

 tibus tribus convexiusculis ; suturis profundis, subcanaliculatis ; labro acuto, arcuato ,- aper- 

 turd ovatd ; columella leviter recedente, vix re/texd, umbilico parvo. 



Shell very minute, thin, smooth, fragile, and semi-transparent, with an elevated 

 spire and rather obtuse apex ; volutions slightly convex ; suture deep, subcanalicu- 

 lated ; aperture ovate ; outer lip sharp and curved, deeply sinuated at the upper 

 part ; inner lip slightly reflected, with a small but distinct umbilicus. 



Axis, \ a line; diameter, f the axis. 



Locality. Cor. Crag, Sutton. 



Of this delicate and pretty little shell I have found about half a dozen specimens, 



