﻿GEOLOGY AND PALEONTOLOGY OF THE CANAL ZONE. 583 



information on Central American between Mexico and Panama, nor 

 is there any on northern South America. 



H. Douville * has referred the "couches de San Fernando" of 

 Trinidad to what he designates "Chattien et Tongrion" or "Stampien 

 superieur." The species of Foraminifera occurring at this horizon, 

 according to Douville, are NummuUies cf. N. vascus, Lepidocydina 

 (Isolepidinay pusiulosa, L. (Isolepidina) "du type ogival," L. (Eu- 

 lepidina) formosa, L. (Eulepidina) cf. L. dilataia. The species in 

 Panama that would represent about the same horizon, according to 

 my interpretation, are Lepidocydina panamensis and L. mulAplicaia, 

 stations 6586e and 6587 (see page 555), L. panamensis, it should bo 

 stated, may range upward into the Emporador limestone, but this 

 is not certfiin. 



The evidence for Barbados is not altogether decisive. Franks and 

 Harrison ^ present the following classification of the Barbadian for- 

 mations : 



(Low-level reefs. 

 High level reefs. 

 Globigerina-vaSitls. 

 Break. 



Miocene Oceanic series. 



Break. 

 Eocene or Oligocene Scotland beds. 



The Globigenna-iadiTls are referred to in the section on page 544 

 of the paper cited, as the Bissex Hill "beds." The only comment 

 I will here make on this section is that it seems to mo phj^sically 

 impossible to have a fringing reef conformably built on Glohigerina 

 ooze deposited in water 1,000 fathoms deep. 



After bringing to bear on the problem of the age of the Scotland 

 beds the information accumulated by R. J. L. Guppy, Harrison and 

 Jukes-Browne, and others, as well as that obtained through his own 

 studies, Gregory says : * "It is therefore advisable at present to cor- 

 relate the whole of the beds in Barbados below the Oceanic Scries 

 with the San Fernando or Naparima marls of Trinidad. Guppy has 

 recently referred these (and the lower part, at least, of the Scotland 

 beds, goes with them) to the Eocene. They are, however, now gen- 

 erally assigned to the Oligocene, as, for example, by Heilprin," 



A preceding paragraph of this paper contains Douville's correlation 

 of the "couches de San Fernando" of Trinidad, with the "Stampien 



> Les Orbitoides do Tile de la Trinity, Comptcs. Rend., vol. 116, pp. 87-92, 1915. 



* This subcrencric name is invalid, Tor it is proposed for Lepidncyclina manlilH, which is the type-spcoies 

 of Lepidocydina. The name should be written Lcpidocjclina (Lepidocydina) pustulosa or [Lepidocydina] 

 Lepidocydina pvslulosa. 



« Franks, G. F., and Harrison, J. B., The G/o^/^crma-marls [and basal reef-rocks] of Barbados, with an 

 appendix on the Foraminifera by F. Chapman, Geol. Soc. London Quart. Journ. vol. 54, pp. 540-555, 

 1S98. 



* Gregory, J. W., Contributions to the paleontology and physical geology of the West Indies, Geol. 

 Soc. London Quart. Journ., vol. 51, pp. 25O-310, pi. 11, 1895. 



