THE FIRST MR-BREATHERS. ,4, 



process on the inner lip. Tlie other has been placed in a new 

 genus, but IS very near to some of the smaller American Snails 



«, Matural .i^.. I, Magnified. ., Apex, rf, Sc„lp,„re. Enlarged. 



stni living. Its most special character is a plate extending from 

 the mner hp over half the aperture, a contrivance for prote" 



».Shd,. Enlarged; ,h.l,„,b.,„„ shows .he „n,„a, sua. .. Sculp„„e. Enlarged 



tion still seen in some modern forms. Thus the Land-snails 



^ Daxvsonella of Bradley. 



