FORAMINIFERA FROM DEEP WELLS 39

 LOWER OLIGOCENE

 In a number of wells there are fragments of Lepidocyclina that may possibly be of Lower Oligocene age but they are not sufficiently well preserved to admit of specific deternmination. Therefore the Oligocene must be very questionably placed in any of these wells except in that at Marathon where at 852 and 900 feet there -occurs the genus Heterostegin o ides which I have found in the Oligocene of Panama and the West Indies.

 EOCENE

 The Upper Eocene represented by the Ocala Limestone can now be very definitely placed in a number of wells. The four speciesLepidocyclina ocalana, L. pseidonarginata, L. pscudocarinata, and L. floridana, together with Hetcrostegina ocalana, mark very definitely the facies of the Ocala Limestone which is developed in north central Florida. The accompanying table shows the depth at which these species occurred in a number of wells. There is no trace of Orthophragmina or of the species of Lepidocyclina and Operculina which are characteristic of the facies of the Ocala developed in northern Florida and southern Georgia. As already noted in the previous paper the Ocala Limestone seems very definitely to he only about 40 feet thick in the various wells in which it was found. Below the typical Ocala there occurs a horizon characterized by a large species of Nunimulites and this in turn in one well-that of the Bonheur Development Company at Burns, Wakulla County, has a horizon marked by numerous specimens of Rotalia armnata which, however, does not seem to be developed in any of the other wells.
 In the well at Ml, arathon on Key Vaca there are a number of rather large specimens vhich may be Conilites americana, or a related species. C. americana is known from the Eocene of St. Bartholomew, Leeward Islands, Haiti, Cuba and Panama. These specimens in the Marathon Well may therefore represent an Eocene horizon below that marked by the Lepidocclina. The well is not cased below the point at which these appear, therefore this actual point of occurrence is somewhat vague. It, however, does represent an Eocene which is apparently typical of Panama and the West Indies, and unlike that of northern Florida.