12 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



Cole (8a, pp. 3-5, pi. i ) lists the following species from the Meson 

 formation of Mexico: L. (Lepidocydina) parvula Cushman, L. 

 (Nephrolepidina) undosa Cushman, L. undosa var. tumida Vaughan, 

 Lepidocydina gigas Cushman, Lepidocydina gigas var. mexicana 

 Cushman, L. {Nephrolepidina) crassata Cushman, Lepidocydina sp., 

 and Heterostegina antillea Cushman. 



The San Luis series and the middle Oligocene of Mexico are 

 known to contain the following large foraminifera in common: L. 

 undosa, L. gigas, L. (Eulepidina) favosa, and possibly Heterostegina 

 antillea. 



A section through the anticline of Buena Vista at the town of Buena 

 Vista, State of Lara (personal communication of Dr. H. G. Kugler to 

 Dr. T. Wayland Vaughan), shows a thick series of variegated shales 

 referred to as the lower part of the lower Oligocene, resting with 

 apparent conformity upon a series of upper Eocene conglomerates and 

 orbitoidal limestones. 



The collection that I have studied contained material from only 

 one locality in the variegated shale series. No larger foraminifera 

 were observed in this material. 



Along the section through the Buena Vista anticline, a thick series 

 of nummulitic limestone occurs directly above the variegated glauco- 

 nitic shales. This nummulitic limestone series is placed by Kugler as 

 upper to lower Oligocene. The larger foraminiferal fauna of this 

 series consists of abundant specimens of Amphistegina lessonii 

 d'Orbigny, Camerina sp. a, and Heterostegina cf . H. antillea Cushman. 

 The above fauna sheds but little light upon the stratigraphic position 

 of this nummulitic limestone. 



Material from sediments of upper Eocene age were collected from 

 Guacharaca out of the Guayaval series (Cerro Campafia limestone), 

 District of Acosta, East Falcon, and also from the Buena Vista 

 anticline at Buena Vista, State of Lara. The fauna contains D. 

 (Asterocydina) asterisca (Guppy), D. (Asterocydina) kugleri 

 Gravell, n. sp., L. (Lepidocydina) trinitatis H. Douville, L. (Lepi- 

 docydina) nmcdonaldi Cushman, Camerina sp. cf. C. parvula (Cush- 

 man), Opercidina sp. cf. 0. cookei Cushman, and Gypsina vesicularis 

 (Parker and Jones). The fauna is distinctly of an upper Eocene type. 



The Guayaval series (Cerro Campafia limestone) is evidently of 

 the same age as the formation from Panama from which Cushman 

 (12, pp. 90-91) described the following species: L. (Lepidocydina) 

 nmcdonaldi Cushman, L. dupUcata Cushman, L. (Pliolepidina) pana- 

 mensis Cushman, and Discocydina minima (Cushman). Cushman 

 questionably referred these species to the Oligocene. Vaughan (47, 



