FORAMINIFERA FROM DEEP WELLS 63

 Peneroplis arietisus H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 204, pl. 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 discoideus Flint.
 Peneroplis pertusus (Forskal), var. discoidens Flint, Ann. Rep. U. S. Nat. Mus., 1897 (1899), p. 304, pl. 49, figs. 1, 2. Cushman, Publ. 291, Carnegie Institution 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 described 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 Marathon on Key Vaca, but the tests.are unlikeinost of the others from this level and apparently came originally from some' distance
above.
 Genus Orbitolites Lamarck, i8oi.Orbitolites americana Cushvian.
 Orbitolites americana Cushman, Bull. 103, U. S. Nat. Mus., 1918, p. 99, pl. 43, figs. 12-14; pl. 44, figs. 1, 2; pl. 45.
 There are fragments of Orbitolites from the well at Marathon 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 Oligoceie 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.