PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



by (he 



SMITHSONIAN INSTITUTION 



U. S. NATIONAL MUSEUM 

 Vol.86 WMhington: 1939 No. 3052 



SPECIES OF THE FORAMINIFERAL FAMILY CAMERIN- 

 IDAE IN THE TERTIARY AND CRETACEOUS OF MEXICO 



By R. Wright Barker 



During my work as micropaleontologist in Mexico, I have met 

 with many species of Camerinidae, but in many cases, owing to inade- 

 quate literature available on the American species of the family, I 

 have deferred identification of them. During the past few years this 

 has resulted in the accumulation of many species with only tentative 

 identifications and in many manuscript names of species believed to 

 be new. 



Recently it became jiossible to carry out research on the collection, 

 and I made and photographed large numbers of sections. I wish 

 to express my thanks to the Compailia Mexicana de Petroleo "El 

 Aquila," S. A., and to the Bataafsche Petroleum Maatschappij for 

 permission to publish material that originally formed part of confi- 

 dential reports; and also to numerous individuals from whom help 

 and advice Mere received, i^jnong these must be mentioned especially 

 Thomas F. Grimsdale, who assisted in sectioning and photographing 

 the specimens, and Dr. T. Wayland Vaughan, who gave helpful 

 criticism and supplied comparative material. Mrs. R. H. Palmer 

 furnished valuable samples from Cuba ; Dr. Lloyd G. Henbest kindly 

 sent topotype material from the United States National Museum; 

 and J. B. Garrett sent further specimens. To all these workers I am 

 especially grateful, as correctly named material is essential in the 

 study of any of the so-called "larger Foraminifera," particularly the 

 Camerinidae, Avhich do not lend themselves to detailed diagnosis as 

 110179—39 1 305 



