PALEONTOLOGY 



FIG. 35. GASTROPODS. 



Neptunea contraria (Linne"), Pliocene. (x.) (After Harmer. ) 

 b, Clavella longteva (Lamark), Eocene. (X^.) (After Deshayes.) 

 A.C., Anterior canal; P.C., posterior canal, c, Volutilithes athleta 



