FORAMINIFERA FROM DEEP WELLS 63 



Peneroplis arietinus H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 204, pi. 13, figs. 18, 19, 22. Heron-Allen and Earland, Trans. Zool. 

 Soc, London vol. 20, 1915, p. 602. 



There are numerous specimens of this species from a depth 

 of 720 feet in the well at Fort Myers. They are somewhat 

 changed in character, showing traces of replacement by calcite, 

 which has somewhat altered the external characters, but the form 

 is very characteristic. 



Peneroplis discoidcus Flint. 



Peneroplis pertusus (Forskal), var. discoidcus Flint, Ann. Rep. U. S. Nat. 

 Mus., 1897 (1899), p. 304, pi. 49, figs. I, 2. Cushman, Publ. 291, Carnegie In- 

 stitution of Washington, 1919, p. 69. 



This should take its rank with the other species of Peneroplis. 

 So far as known it is limited to the West Indian region, being de- 

 scribed by Flint from the shallow water of Key West Harbor, 

 Florida. I have recorded it from the Miocene of Bluff 3, Cercado 

 de Mao, Santo Domingo. ■ ' . 



It occurred in material at 1,140 feet in the well at Mara- 

 thon on Key Vaca, but the tests-are unlike'most of the others from 

 this level and apparently came originally from some distance 

 above. 



Genus Orbit olites Lamarck, i8oi,- 



Orbitolites americana Cushman. 



Orbitolites americana Cushman, Bull. 103, U. S. Nat. Mus., 1918, p. 99, pi. 

 43, figs. 12-14; pl- 44, figs. I, 2; pi. 45. 



There are fragments of Orbitolites from the well at Mara- 

 thon on Key Vaca at a depth "of 589 feet which in the general 

 characters of the interior very closely resemble the species which 

 I have described from the Emperador Limestone and the Culebra 

 formation of the Panama Canal Zone. 



Orbitolites is characteristic of the American Upper Oligocene 

 in the Tampa formation of Florida and the Anguilla formation 

 of Anguilla and Cuba. Therefore this level of the Marathon 

 Well should be_ Upper Oligocene. 



