93 
NERITA spirata 0 
TAB. CCCCLXIII — fis. 1 and 2. 
Spec. Char. Semiglobose, smooth; spire small, 
partly immersed ; upper parts of the whorls 
flat, when old, concave ; aperture trans- 
versely oval. 
A. s mooth 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 Plum tree ; 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 speci- 
men in that neighbour- hood. 
NERITA minuta. 
TAB. CCCCLXIII. —fig. 3 and 4. 
Spec. Char. Hemispherical, smooth; spire 
indistinct ; aperture oval ; columellar lip 
not toothed. 
Y ery small and smooth ; length not one line ; the entire 
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 Cookson* 
fig. 3 is magnified. 
