660 E. H. SELLARDS 



as a possibility. It thus appears that the problem is confined to a 

 study of the stream fill, and that the determination of the age of 

 the human remains depends upon a correct understanding of the 

 history of accumulation of material within the stream bed. 



The view which the writer holds regarding the stream deposit 

 has been expressed in papers previously published. The earliest 

 phase of deposition in this stream bed includes local accumulations 

 of muck which fill holes and channels in the underlying marine 

 shell marl. Another phase which is general and is observed through- 

 out most of the stream valley includes light-colored, often cross- 

 bedded, sands which pass at a higher level into brown or dark-colored 

 sand. This part of the deposit has been designated as stratum 

 No. 2. Above this brown sand is found as a rule an accumula- 

 tion of alternating layers of sand and muck, stratum No. 3, which 

 when fully developed is capped by a fresh-water marl. The 

 maximum thickness of the stream fill as preserved at the present 

 time is from 4 to 8 feet. The first human bones obtained were in 

 the brown sand beneath the fresh-water marl, and additional 

 bones were subsequently found in this sand. A flint spawl was 

 found in place in the sand and additional flints and two bone imple- 

 ments were obtained from siftings. From the alternating layers 

 of sand and muck which lie above the brown sand human bones 

 and artifacts have been taken in considerable numbers. 



As already stated, human bones and implements have been 

 taken from beneath the fresh-water marl. The last bone imple- 

 ment collected on the recent visit to the locality (Florida Survey 

 collection No. 7786) was found beneath this marl and lay at a 

 depth of 4 feet from the surface. The place of this implement is 

 on the south bank 32 feet west of the lateral inlet canal. The bank 

 at this place is relatively high and has retained its capping of 

 fresh- water marl. It is evident, therefore, that the human materials 

 of this deposit were not accumulated by the recent stream. On the 

 contrary, they lie in deposits accumulated at an earlier stage. 



The writer's interpretation, as expressed in papers previously 

 published, is that the human remains and artifacts are contempo- 

 raneous with the extinct vertebrates of this deposit, and that the 

 age of the formation, according to the accepted interpretation of 

 faunas and floras, is Pleistocene. 



