W. H. Ball— Geology of Florida. 167 



water in the harbor of Tampa at the railroad wharf, according 

 to recent surveys. Its exact thickness here I was not able to 

 determine. I was informed that the same rock occurred on 

 the Manatee river above Braidentown and still farther to the 

 south and west I observed it about one mile from Sarasota 

 village, on the road from Braidentown, in the gulley of a small 

 rivulet about half a mile from the shore of the bay. 



This rock, which is evidently younger than the siliceous 

 stratum, has been referred by Heilprin to the "Yorktown" 

 epoch of Dana or Middle Miocene. There is an outcrop of 

 rock at Bowley's Creek emptying into Sarasota Bay, about 

 eight or nine miles N. W. of Sarasota, and about two miles 

 from its mouth. This can only be reached at high water, and 

 is then a foot or two below the surface. I visited it and suc- 

 ceeded in getting some fragments with prints of two species 

 of Pecten and one of Ostrea, with traces of a Spo?idylus, all of 

 which are represented either in other Miocene localities or in 

 the outcrops at White Beach, about to be described. The rock 

 was covered with quaternary beds of sand containing recent 

 shells in a semi-fossil condition. 



In the northwestern extreme of Little Sarasota Bay there is 

 an outcrop of rock which at high water rises two or three feet 

 above the water. It is a yellowish limestone much waterworn 

 and covered in places with a thin layer of recent sand-rock. It 

 contains distorted molds of many species which cannot be 

 recognized, but in some places these molds have become filled 

 with a pseudomorph in lime of the original shell. These 

 pseudomorphs are gradually exposed by the action of the sea 

 on the rock, and afforded about forty species of molluscan fos- 

 sils, besides several corals and corallines. The rock did not 

 show any foraminifera, though several of the species of shells 

 are identical with those of the orbitolite stratum of Tampa. 



Of the species obtained here eight appeared on a preliminary 

 study to be new or peculiar to this locality ; of the others, 

 twelve seemed identical with species of the siliceous beds at 

 Ballast Point, and four more with Miocene species from the 

 island of Jamaica, West Indies, and other localities. Seven- 

 teen species, of which eight are supposed to be extinct, were 

 subsequently found in the Caloosahatchie beds, and two are 

 known from other Pliocene deposits. The other nine, with 

 three not obtained on the Caloosahatchie, are believed to sur- 

 vive to the present day in adjacent waters. 



While this association of species is probably only a small 

 part of those which comprised the original White Beach fauna, 

 the proportion of forms indicates that the stratum represented, 

 is later than the Tampa Miocene, and that its fauna is transi- 

 tional toward that of the Caloosahatchie deposits, which 



