U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. 86 PLATE 15 



1, -, Opercuhnoidfs ocalanus (Cushman) minor, new variety, Guayaba! formation (Tempoa! of ver Wiebe and Muir) 

 collection P. von Schumacher no. 2S89. east of Tempoal, Veracruz: 3, 0. oliveri (Cushman), Guayabal formation, 

 topotype material from Romance, Rio Moclezuma; 4, Opercdinoides sp. A, Tantoyuca formation, collection P. 

 von Schumacher no. 1624. east of Tempoal; 5, O. ocalan'^s (Cushman), Tantovuca formation, collection K. T. 

 Ooldschmid Pit. no. 285, southeast of Tempoal. X20. 



