U. S. NATIONAL MUSEUM 



BULLETIN 181 PLATE 12 



v3 



1 



* 



1!) 



A # 



(» 





10 



^'t*^. 



11 



» 



12 







v^lsl? 



L'S 



30 



;-]i 



\ 



29 



36 



Cyclophorid mollusks of America. 



FOR EXPLANATIOtg OF PLATE SEE PAGE 235. 



