﻿GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. 58& 



Correlation : Probably Gatun formation. 

 7S5G. Three kilometers north of Usiacuri, Colombia. 



Oliva species. Ostrea species. 



Cancellaria species. Pecten species. 



Pelaloconchus dominigensis Sowerby? Anomia species. 



Turrilella gatunensis Conrad. Basta species. 



species. Cardium. species. 



Ghjajmcris species (also at 7873). Chione species. 

 Area aff. A. grandis Broderip and Sowerby Barnacle. 



Correlation: Probably Gatun formation. 

 7874. River bed at Usiacm'i, 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). Cerithium, 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 Springvalc, 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 iornata" 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 arc 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, Cysiecldnus crassus Guppy. 



PI. Douville reports Lcpidocyclina giraudi R. Douville from the 

 "Burdigahen do la Martinique."^ Subsequently (p. 591) Mollusca 

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

 horizon, will be considered. 



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

 Soc. I'aper No. 4-10; pp. 15, 1911; Fossils from Springvale, near Couva, Trinidad, Idem., Paper No. 45-1 , 

 pp. 10, 3 pis., 1911. 



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



