NOTE 



Additional American species of OpercuUna and Nummulites (Camerina) have 

 been described by F. M. Anderson {N. carmencnsis. Proc. California Acad. Sci., 

 ser. 4, vol. 17, no. 1, p. 26, pi. 1, figs. 23, 24, 1928) ; Katherine van Winkle 

 Palmer (N. costaricensis, Bull. Amer. Pal., vol. 10, no. 40, p. 9, pi. 1, fig. 9, 

 1923) ; P. J. Pijpers (0. ionaircnsis, "Geology and Palaeontology of Bonaire 

 (Dutch West Indies)," p. 56, pi. 1. figs. 32, 33, 1933); and Willard Berry 

 (O. atascaderensis, 0. a. samanlca, O. peruviana, O. samanica, and O. talara, 

 Eclogae geol. Helvetiae, vol. 23, 1930, and Journ. Washington Acad. Sci., vol. 

 22, 1932). These are not considered of suflicient importance in connection 

 vrith the present studies to warrant their inclusion in the foregoing list of 

 literature. 



While the present account was awaiting publication two important additions 

 were made to the literature of the American species of Camerinidae ; namely, 

 "The Lcpidocj/cUna tcxana Horizon in the Ilctcrosicijixa Zone, Upper Oligocene 

 of Texas and Louisiana," by Donald AV. Gravell and Marcus A. Hanua (Journ. 

 Pal., vol. 11, pp. 517-529, pis. (50-65, 1937), in which two new species wene de- 

 scribed {Opcrculinoides cUisorae and 0. hou-ei), and "Stratigraphy and Micro- 

 paleontology of Two Deep Wells in Florida," by W. Storrs Cole (Florida Dept. 

 Couserv. Geol. Bull. 10, pp. 1-73, pis. 1-12, 1938), referring to several American 

 species of Operculinoides, with excellent figures. It is regretted that these 

 publications were received too late for inclusion in the discussion of the Mexican 

 species of Operculinoides. Reference should also be made to a recent paper by 

 Donald W. Gravell and Marcus A. Hanua, entitled "Subsurface Tertiary Zones 

 of Correlation through Mississippi, Alabama, and Florida" (Bull. Amer. Assoc. 

 Petr. Geol., vol. 22, no. 8, pp. 984-1013, pis. 1-17, 1938), in which notes are given 

 regarding the distribution and zonal value of a number of species of Camerin- 

 idae, and several species are figured. 

 330 



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