NEW TERTIARY FORAMINIFERA VAUGHAN" AND COLE 495 



EXPLANATION OF PLATES 

 Plate 35 



1-4. Operciilina tuberculata, new species, cotypes : 1, View of outside of tliree 



specimens, X 12.5 ; 2, median section, X 15 ; 3, transverse section, 



X 20 ; 3a, part of section represented by fig. 3, X 107 ; 4, transverse 



section, X 20. 



All from Cortez Agu.^da well no. 2. Fig. 1, deptli 2,750-2,800 feet; 



fig. 2, 2,675-2,725 feet ; figs. 3 and 4, 2,625-2,050 feet. 

 5-7. Operculinoides advenus, new species, cotypes: 5, Vievv^ of outside of two 



specimens, X 13 ; 6, median section, X 20 ; 7, transverse section, x 20. 



From M SO V and M 81 V, Eio Vinazco, 1.35-1.4 km downstream from 



crossing of road from Bueua Vista to Vinazco. 



Plate 36 

 Opei'culinoidcs vicksbin'gtmsis, new species 



1. View of outside of four specimens, X 10. 



2. Natural section in median plane, X 20. 



3. Section in median plane, X 20. 



4. Section in median plane impregnated with Canada balsam and decalcified, 



X 20. 

 4a. Part of outer wall and chamber wall of specimen represented by fig. 4, 

 showing canals filled with balsam, X 210. 



5. Section in median plane, X 20. 



6. Transverse section, X 20. 



Figs. l-4a and 6, cotypes, from Byram calcareous marl. National Cemetery, 

 Vicksburg, Miss. Fig. 5, from one-fourth mile west of Floral Church, Covington 

 County, Ala. 



Plate 37 



1-3. Opcrciilinoides forresti, new species, cotypes: 1, Outside of specimen, X 

 10 ; 2, median section, X 20 ; 3, transverse section, X 20. 

 All from tilted beds, east of Lynch's, Antigua. 

 4-9. Operculinoides tuxpanicus, new species, cotypes: 4, 5, Outside of two 

 specimens, X 10; 6, 7, sections in median planes of two specimens, X 

 15; 8, 9, transverse sections of two specimens, X 20. 



All from M 76 S, Roundtop, southeast of the Plaza, City of Tuxpan, 

 Veracruz, Mexico. 

 10-13. Operculinoides semmesi, new species, cotypes: 10, View of outside of four 

 specimens, X 12.5; 11, section in median plane, X 20; 12, 13, transverse 

 sections of two specimens, X 20. 

 All from village of I\Ies6n, Canton of Tuxpan, Veracruz, Mexico. 

 14. Apparently Operculinoides semmesi, but with slightly fewer chambers in 

 a whorl. 



From Meson Village. 



