174 FLORIDA GEOLOGICAL SURVEY-I3TH ANNUAL REPORT

chocolate-colored, it commonly has phosphate pebbles scattered through it, or underlying it at no great depth, and it is probable that the same sort of soil at the other localities contains more phosphorus than the common creamy sand, though those in the lake region are. remote from any known phosphate deposits, and the reason for the difference in color there is not obvious.
 The vegetation on the darkest phase near the Peace. River is usually of the semi-calcareous hammock type, while elsewhere it is mostly high pine land, but differing from typical high pine land in having more turkey oak than black-jack--or sometimes very few oaks of any kind-and more. Spanish moss on the pines than usual (especially around Dade City). This being evidently a better soil than those previously described, a goodk deal of it is cultivated.
 In a few places in the lake region, for example in southern Polk County, the prevailing sand has a rusty yellowish color, presumably due to iron, but is similar to the creamy sand in depth, texture, and vegetation. A more remarkable type, occurring on high uplands a few miles south of Lakeland, is ashy gray in color, with considerable silt or rather very fine material in it. This is close to the pebble phosphate country but high above it, and its derivation and composition are unknown. The gray. matter does not appear to be of the nature of humus.* The vegetation is mostly of the high pine land type., with turkey oaks exceptionally large and numerous. A large part of this soil has been cleared and planted to orange groves.
 Semi-calcarcous hammock land. This is a makeshift term used by the writer to cover a variety of upland soil that is mostly sand, but has enough limestone within a few feet of the surface or outcropping to influence the vegetation perceptibly. It is an intermediate condition between the creamy sand already described and the calcareous uplands described on the next page. It is comnon in the vicinity of Ocala, and has been mapped as "Fellowship sand," "Fellowship sandy loam," Gainesville. loamy sand," "Gainesville sandy loam," and Portsmouth sandy loam;" and it is represented in the following tables by mechanical analyses 10-14, 17, IS, 21-24, 48-51, and chemical analyses B, G, N and S.
 *This soil in color resembles some near the center of Alachua County, mentioned incidentally in the Sixth Annual Report, p. 370; and in texture it reminds one of the less of southwestern Mississippi which is supposed to have been transported by the wind.