15 i Beautiful Shells. 



of Great Britain and Ireland. The mud is prolific 

 of sliells; witness tlio rianorliis faiii:ly, of wiiicli 



79. LimniDus auricularius (tlio Wide-eared Mud Shell), 

 Linnccns. 80. L. percger (the Travelled Mud Shell), 

 Mullcr. 81. L. Btagnalis (the Lake Mud Shell), Linnccus. 

 82. L. fossarius (the Ditch Mud Shell), Tnrion. 83. L. 

 glaber (the Eight- Whorled Mud Shell), Hid. 81-85. L. 

 palustris (the Marsh 'Mud Shell), Linnceus. 86. L. gluti- 

 nosus (the Glutinous Mud Shell), Miillci', 



nine species arc hero figured. They have been 

 likened to tlie fossil Ammonites, for whicli they miglit 

 be taken as miniature copies. The name is lienco 

 a kind of contradiction in terms, compounded of 

 the words wliicli signify '' flat '' and ''ball.'' Tho 

 largest is the P. corncus (Figs. 05 and 66), an inch 

 in diameter; tlio others arc P. albus, from one- 



