178 MOLLUSCA FROM THE CRAG. 



8. BULLA LAJONKAIREANA. Bast. Tab. XXI, fig. 5, a c. 



BULLINA LAJONKAIREANA. Sast.Desc. Geol. duBassin. 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 SPIKATA. Dubois, de Montp. Foss. de Volhyn. pi. 1, fig. 11-12, 1831. 



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



CLANDESTINA - - pi. lj 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. 



Dujard. 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 pusittd, cylindricd, l&vigatd ; spird brcvi, apice obtuso ; suturis subcanali- 

 ctdatis ; aperturd superne angustd, lineari, inferne dilatatd ; plied ad basim columellce vise 

 distinctd. 



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, \ 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 pmilld, exigud, lavigatd, hyalind ; spird elevatd ; apice oUmiusculo ; anfrac- 

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

 turd ovatd; columella leviter recedente, vix reflexd, umbilico parvo. 



Shell very minute, thin, smooth, fragile, and semitransparent, with an elevated 

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

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

 lip slightly reflected, with a small but distinct umbilicus. 



Axis, J 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, 



