156 
smooth and shining, without any transverse striae, such as 
are upon Lymnaea stagnalis. It differs from Lamarck’s 
Lymnaeus longiscatus, and I believe from all other species 
in the flatness of its whorls, or rather the straightness of 
the sides of its spire ; it is also shorter than L. longiscatus. 
This shell is the produce of one of the fresh water de- 
positions on the Isle of Wight ; it was collected by the 
Rev. Mr. Iremonger, and sent me along with Planorbis 
euomphalus, tab. 140. 
LYMNJEA minima. 
TAB. CLXIX. — Figs l. 
Spec. Char. Elongated, smooth ; volutions rather 
convex ; aperture less than half the length of 
the shell, ovate ; last whorl not ventricose. 
A small shell, only three or four lines lung, nearly 
related to L longiscatus but shorter. 
It is probable that this may be the young of some other 
species ; it occurs with a minute Patella along with the 
shell above described. 
