U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. 86 PLATE 11 



1, Operculinoides oliveri i,Cushman), probably a topotype, from Guayabal beds, near Romance, Rio Moctezuma, 

 Mexico; 2, 3, 0. vaughani (Cushman), Guayabal beds, Guayabal, Tamatoco, Veracruz (type locality of W. S. 

 Cole). XIS. 



