vaughan: correlation ot tertiary formations 271 



given in my paper on the fossil corals from Central America, 

 Cuba, and Porto Rico. 



St. Bartholmnew limestone. This formation is of upper Eocene 

 age and is paleontologically characterized by species of Ortho- 

 -phragmina, one of which is of stellate form, similar to those 

 recently described b}" Cushman'' from the Ocala limestone of 

 Georgia and Florida; by about 30 species of corals, among which 

 the genera Stylophora, Astrocoenia, Antilloseris, Physoseris, and 

 Actinacis are conspicuous; by many echinoids, which were 

 described by Cotteau; and by some Mollusca and Brachipoda 

 described by C. W. Cooke in a manuscript now awaiting publica- 

 tion. The formation is typically exposed along the shore of St. 

 Bartholomew northwest of St. Jean Bay for a distance of about 

 one and a half miles. The rock is a hard bluish limestone, inter- 

 bedded at its base with volcanic tuffs and water-worn volcanic 

 fragments. 



Anguilla formation. This formation is uppermost Oligocene, 

 if the Aquitanian of Europe is correctly referred to the 

 Oligocene. In the opinion of some paleontologists it would be 

 classified as earliest Miocene. It is paleontologically char- 

 acterized by certain Foraminifera, described by J. A. Cushman 

 in a report not yet published; by numerous species of corals, 

 among which are the genera Stylophora, Stylocoenia, Antillia, 

 Orbicella, Siderastrea, and Goniopora; by echinoids described by 

 Guppy or by Cotteau, among which are Echinolampas semiorhis 

 Guppy, E. lycopersicus Cotteau, and Agasizzia clevei Cotteau; 

 and by a number of species of Mollusca, described in manu- 

 script by C. W. Cooke. The Mollusca include Amusium lyonii 

 Gabb and Orthaulax pugnax (Heilprin). I obtained no specimens 

 of Lepidocyclina in Anguilla. The type exposure is along the 

 southeast and south shore of Crocus Bay. The material con- 

 sists of calcareous clay, argillaceous limestone, and more or less 

 pure limestone. The formation unconformably overlies basic 

 igneous rock. 



' Cushman, J. A., Orhitoid foraminifera of the genus Orthophragmina from 

 Georgia and Florida. U. S. Geol. Survey Prof. Paper 108: 115-124, pis. 40-44. 

 Dec. 12, 1917. 



