118 THE ELEMENTS 



Fig. 13th —TURBO LABIATUS. 



Shell with nine reversed volutions or 

 whorls, tapering to a fine point ; co-* 



lour light brown, with strong, regular, 



longitudinal stria? ; volutions flat, and 



separated by a fine obsolete liue ; 



aperture sub-orbicular and white, with 



a sinus at the upper end, with two 



teeth-like lamina on the inner lip ; 



margin reflected, broad and thick. 



Found in Hyde Park, and the ozier 



grounds at Battersea in Surrey. 



Linn. Trans, vol. viii. page 180. 



b Reversed or heterosUophe spire, 

 a teeth of a univalve. 



Fig. 14th -HELIX PLANORBIS. 

 Shell depressed and sub-pel! ucid, 

 horn-coloured, rufous, or light chesnut 

 brown ; generally with a light uraber^ 

 coloured epidermis ; volutions five, 

 placed laterally on each other, gradu- 

 ally decreasing to the centre, making 

 the shell concave at top, rounded and 

 defined by the suture ; subulated 



i 



