156 
smooth and shining, without any transverse striz, such as 
are upon Lymnea stagnalis. It differs from Lamarck’s 
Lymneus 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. 
LYMN AA minima. 
TAB. CLXIX.— Fig. 1. 
Spec. Cuar. Elongated, smooth ; volutions rather 
convex ; aperture less than half the length of 
the shell, ovate ; last whorl not ventricose. 
a 
A sma shell, only three or four lines long, 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. 
