THE MOLLUSCA 

 Physidae 



975 



Fig. VI. Physa hutnerosa Gld, 



Ancylidae 



Fig. VII. Gundlachia meekiana Stimp. 



Ampullarudae 



Fig. VIII. Ampttllaria paludosa Say. 



Fig. IX. Viviparus interiextus Say. 



Fxo. X. Valvata tricarinata Say. 



