496 PROCEEDINGS OF THE NATIONAL MUSEUM vol.83 



Plate 38 



1, 2. Opcrciilinoides seramesi, new species : 1, Outside of specimen, X 10 ; 2, 

 median section, X 15. 



Both from M 36 V, Azteea Incline, Canton of Tuxpan, Veracruz, 

 Mexico. 

 3,4. Operciilinoidcs sp. cf. 0. sctnmcsi: 3, Median section, X 20; 4, transverse 

 section, X 20. 



Both from M 55 V, 50 feet alcove base of bluff, up slope leading from 

 La Ceiba crossing over Rio Buena Vista, Canton of Tuxpan, Vera- 

 cruz, Mexico. Note that in fig. 3 there are more chambers than in 

 pi. 37, fig. 11, and in pi. 38, fig. 2, and that fig. 4 is thicker than 

 specimen shown on pi. 37, figs. 12 and 13. 

 5,6. Apparently OpercuUnoides semmesi: 5, Median section, X 20; 6, trans- 

 verse section, X 20. 



Both from M 56 V, near La Ceiba crossing over Rio Buena Vista, 

 same horizon as M 55 V. 

 7-10. Operciilinoidcs antigucnsis, new species, cotypes : 7, View of outside of 

 two specimens, X 12.5 ; 8, median section, X 20 ; 9, 10, vertical sections 

 of two specimens, X 20. 



All from oast side of Folly Hill, Nonsuch Bay, Antigua, British 

 West Indies. 



U S GOVCRNHENT PRINTINS OFFICE; 1936 



