REGIONAL DESCRIPTIONS
 I. THE WEST COAST ISLANDS
 (Figs. 3, 4, 37. Soil analyses 0, P.)
 This includes the Cedar Keys archipelago in Levy County, the St. Martin's Keys and other small rocky islands along the coast ot Citrus and adjoining counties, and a narrow line. of barrier-beach islands (the Anclote Keys, Long Key, etc.') lying from half a mile to three or four miles off shore in Pinellas County; the whole- covering perhaps not more than ten or twelve square miles.
 The Cedar Keys islands are mostly of sand heaped up by the wind (to a height of about 45 feet on Sea Horse Key), but there is considerable calcareous material also, in the form of shell fragments. Between them and the mainland the water is very shallow and dotted vith innumerable catches of salt marsh vegetation (fig. 3), and much of the bottom is covered with oyster bars. There is a wagon road from Cedar Key to the mainland which up to a few years ago was rather unique in being submerged twice at day at high tide. There were a few bridges across the deeper places, and between them stakes were driven along the road so that it could be. followed when the tide was up.
 The "keys" of Pinellas County are also very sandy, but seem to have a larger proportion of shell material than the Cedar Keys group, and there is more lime-loving vegetation. Dunes are not extensively developed.
 Some climatic data for Cedar Keys and Tarpon Springs are given in Table 19, in the general part of this report. The climate resembles that of the rest of central Florida in having mild winters and wet summers, but the Gulf of Mexico doubtless makes the temperature more uniform than.it is in the interior. The rarity of killing frosts is indicated by the occurrence of black mangrove at Cedar Keys and red mangrove in Pinellas County.
 The principal vegetation types are the sparse coarse grassy vegetation characteristic of beac hes and dunes, the salt marshes and mangrove -wams (fig. 17). scrubby thickets difficult to classifv-, and sandy hammocks: The sequence of the following- plant' list cannot be regarded as very accurate, on account of the writer's S4