72 IN LOWER FLORIDA WILDS 



of Liguus crenatus and then a large Oxystyla. All 

 these grow only on the trees in the high hammocks 

 and are found living to-day on the Upper Keys, 

 having possibly originated on them and crossed 

 over to the Cape Sable region by way of the old 

 land bridge which I have elsewhere mentioned. 

 From Cape Sable they appear to have reached 

 the Ten Thousand Islands. I do not believe it 

 was possible for these hammock-living arboreal 

 snails to have inhabited these islands previous to 

 the coming of these prehistoric peoples, nor, in all 

 probability until after they vanished. It is quite 

 probable that the Upper Keys were finished into 

 essentially their present condition at the time of 

 the second Pleistocene uplift and that these tree 

 snails were developed, migrated to the mainland, 

 and from there to the archipelago at about this 

 time. If I am right in these surmises it seems 

 quite probable that these aborigines are as old 

 as the completed upper chain of keys and that 

 they passed away while the present hammock 

 fauna was migrating to the archipelago. 



In his most readable book, Florida Trails, Win- 

 throp Packard states that the royal palm is not 

 a native of Florida. This is a mistake as it may 



