GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 580 



Correlation : Probably Gatun formation. 

 7850. Three kilometers north of Usiacuri, Colombia. 



Oliva species. Ostrea species. 



Cancellaria species. Pecten species. 



Petaloconchus dominigensis Sowerby? Anomia species. 



Turritella gatunensis Conrad. Basta species. 



species. Cardium species. 



Glycymcris species (also at 7873). Chione specfes. 

 Area aff. A. grandis Broderip and Sowerby Barnacle. 



Correlation: Probably Gatun formation. 

 7874. River bed at Usiacuri, Colombia. G. C. Matson, collector. 

 Ostrea species, like that at station 7859. 



7857. Weathered surface of calcareous hard sandstone at San Anto- 



nio, 18 miles east of Tenerife, Colombia. Rogers and Wil- 

 son, collectors. 



Terebra 2 species. Turritella altilira Conrad. 



Tunis, like T. albida (Perry). Cerilhium, 2 species. 



Cancellaria cf. C. guppyi Gabb. Chama species, etc. 



7858. Creek bed at San Antonio. Same bed as 7857. 

 Cerithium species. Scapharca species. 



7859. Creek at San Antonio. 



Scapharca cf. S. chiriquiensis (Gabb). Ostrea species, etc. 



Other material was forwarded by Mr. Matson, but it has not been 

 examined. 



Marine deposits of similar age are found in Venezuela at Cumana 

 and in Trinidad. R. J. L. Guppy has published two interesting 

 papers * in which he compares the species found at Springvale, Trini- 

 dad, with species from Cumana (Venezuela), Jamaica, and Haiti. 

 Douville, in his account of the orbitoids of Trinidad, places the 

 "couches de Cumana a Turritella tornata" in the Burdigalian. 



The "Oceanic Series" of Barbados (see p. 583 of this paper) is 

 referred to the Miocene by all the recent students of that island. 

 They are deposits supposed to have been laid down in water at least 

 1,000 fathoms deep, as they contain beds of radiolarian earth and 

 specimens of a deep-sea echinoid, Cyslecliinus crassus Guppy. 



H. Douville reports Lcpidocyclina giraudi R. Douville from the 

 "Burdigalien do la Martinique." 2 Subsequently (p. 591) Mollusca 

 from Martinique, thought by M. Cossmann to represent a higher 

 horizon, will be considered. 



1 Guppy, R. J. L., On a collection of fossils from Springvale, near Couva, Trinidad, Trinidad Agric. 

 Soc. Paper No. 440, pp. 15, 1911; Fossils from Springvale, near Couva, Trinidad, Idem., Paper No. 454 , 

 pp. 10. 3 pis., 1911. 



» Comptes Rend., vol. 161, p. 89, 1915. 



