PROC. ACAD. NAT. SCI. FHILA. 1905. 



PLATE XVI. 



(00 



99 



10 



102 



'03 



\04- 



105 



V 



V 



106 



101 



^^ 



08 



109 



10 



/N 



/cz 





f/4 



115 



/i3 



lib 



U7 



PILSBRY. MOLLUSCA OF THE SOUTHWESTERN STATES. 



