9i 



iNERITA spirata. 



TAB. CCCCLXIIL— /^. iand± 



Spec. Char. Semiglobose, smooth; spire small, 

 partly immersed ; upper parts of the whorls 

 flat, when old, concare ; aperture trans- 

 versely oval. 



A SMOOTH ventricose Nerite, rapidly expanding towards 

 the aperture ; the lines of growth are sometimes rather 

 conspicuous upon the flat parts of the whorls, in other 

 parts they are very slight : I have not seen the co- 

 lumella. 



Occurs in the mountain Limestone. Fig. 1, is from a 

 specimen presented by the Rev. Robert Plumtree; it 

 was found in Gloucestershire, and fig. 2, a small indivi- 

 dual, from Derbyshire : it has also been found near 

 Bristol, the Dean of Bristol having obtained a specie 

 men in that neighbour- hood. 



NERITA miniita. 



TAB. CCCCLXIIL— /^. 3 and 4. 



Spec. Char. Hemispherical, smooth; spire 

 indistinct; aperture oval; columellar lip 

 not toothed. 



Very small and smooth ; length not one line ; the entirs 

 edge of the columella makes it a doubtful Nerite. 



Produced by the Oolite of Ancliff, along with the next. 

 Figured from the Cabinet of the Rev. George Cook»on; 

 fig. 3 is magnified. 



