U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. 86 PLATE 17 



1, Operculinoides antiguensis Vaughan and Cole, Meson formation, Bustos Well no. 1, near Bustos, Veracruz; 2, 0. tux- 

 panensis (Thalmann), Tuxpam formation, near Tuxpam, V'eracniz; 3, O. jenn\i, new species, Guayabal formation, 

 near Sabaneta, Veracruz, collection H. Jenny no. 1573; 4, 0. prenummuliiijormis , new species, Guayabal formation, 

 well sample, Poza Rica no. 8; 5, 0. nummiditijormis (Rutten), Tantoyuca formation, collection P. von Schumacher 

 no. 2412, east of Tempoal, Veracruz. X20. 



