U. S. NATIONAL MUSEUM 



PROCEEDINGS. VOL. 86 PLATE 20 



1, Operculinoides muiri, new species, A'.azan formation (Huasteca of Muir), collection E. Gevaerls no. 269, southern 

 Miahuapam, Veracruz; 2, Camerina moodybranchensis Gravell and Hanna, Tan'.oyuca, well sample, Poza Rica 

 no. 7; 3, .?C. dickfrsoni Palmer, Cardenas beds (Upper Cretaceous), near Cardenas, San Luis Potosi, X42; 

 4, S, C. jacksonensis Gravell and Hanna globosa, new variety, Tantoyuca formation, near Tantoyuca, Veracruz, 

 collection W. H. Hegwein no. 2483; 6, Wperculinoides sp., Tantoyuca formation, collection H. Meyer no. 1471, 

 near Los Ajos, Santa Clara, southeast of Tantoyuca; 7, Operculinoides sp. B, Guayabal formation (Tempoal of 

 Muir and ver Wiebe), collection H. Rankin no. 277, Tantoyuca region; 8, Camerina jacksonensis Gravell and 

 Hanna, Tantoyuca formation, Tantoyuca type localiry, near Tantoyuca; 9, 11, Operculinoides tuberculatus 

 (Vaughan and Cole), Tantoyuca formation, collection W. H. Hegwein no. 1559, Tantoyuca region; 10, Camerina 

 pellatispiroides, new species, El Cristo Well no. 1. All figures e.xcept fig. 3 X20. 



