140 



very sharp, body smaller, narrower, and the mouth of 

 considerably less size. Length three-quarters of an 

 incjj, breadth half an inch. 



It invariably keeps at the bottom of the veater, crawl- 

 ing on the mud, never rising to bask at the surface like 

 LimnaBus auricularius. 



It never lays more than 40 eggs at a timej these are 

 deposited in three rows, in a glutinous envelope, and 

 attached to decayed leaves at the bottom of the water. 



In this neighbourhood it has only been found in the 

 lake at Highfield House, and even there not abundantly. 



Some specimens sent from Bath by Lieut. R. W. H., 

 Hardy were somewhat similar, but slightly more acute. 



Limnaeus auricalarious is, according to Mr. Morris, 

 found fossil in the fresh-water deposits hear London. 



LiMNJEUS PEBEGER [The Puddlc Mud Shell]. Miiller. 

 Figure 104. 



10^ 



It is hardly possible to describe this shell, it is so 

 varied in form and general appearance; it is, however, 

 mostly acutely egg-shaped. Aperture projecting and 

 capacious; body whoil very large. Fragile, w^rinkled, 

 thin, sharp but thin spire. Horn-coloured, or paler. 



Length half an inch, but large examples are some- 

 times as much as an inch. 



The colour of the animal is olive green, with dark 

 marbling on the back. 



