86 BLUE CHALK MARL. 



found at Godstone in Surrey, Mailing in Kent, and in Cambridgeshire. I 

 have named it in honour of Charles Konig, Esq. of the British Museum? 

 whose attainments in mineralogical science, can only be equalled by his 

 zealous exertions for the prosperity of the national institution to which he 

 is attached. 



Fig. 22, the upper surface ; fig. 24, the base. 



S. Turbinoha. A small species, inversely conical, compressed, aper- 

 ture oval ; the lamellae numerous, distinct ; axis void ; the external surface 

 covered with minute longitudinal striae, which unite with the lamellae at 

 the margin. 



A few imperfect specimens only have been discovered. 



4. Echino spatangus ; this specimen resembles the echinite from De- 

 vizes, figured by Mr. Smith, as pecuUar to the brick earth. (Smith's 

 strata, Brick earth, fig. 3.) 



5. Fragments of a ventricose univalve, its genuine characters not 

 distinguishable, 



6. Cirrus plicatus. (Min. Conch. Vol. 2, tab. 141. fig. 3.) 



A conical univalve, transversely striated; having the umbilicus pli- 

 cated. Occurs occasionally at Kingmer. 



7. Rostellaria carinata. Tab. xix. fig. 10, 11, 12. 14. 



Turreted, spirally striated; whorls, eight or nine; ornamented with 

 a row of tubercles ; body of the lower volution strongly carinated above 

 the middle, and terminating in a spinous process on the outer lip. 



The casts of this shell are composed of indurated marl of a glossy 

 black colour, and but rarely occur in a perfect state. In some specimens 

 portions of the shell are still visible, and these shew that the original was 

 covered with minute transverse striae; the tubercles on the shell are more 

 elongated than in the casts, assuming the form of ribs. 



This species occurs at Laughton, Ringmer, Norlington, &c. 



Tab. xix. fig. 10, casts of the spire attached to a block of marl. 



Fig. 11. A fragment of the summit of the spire covered with the 

 shell ; this elegant specimen exhibits the spiral striae, and the elongated 

 tubercular projections. 



