1892.] Shell Heaps of Florida. 919 
42. Moccasin Island, southeast end of Lake Winder. 
43. Turtle mound, four miles north of Lake Washington. 
NOTE A. 
EXTENT OF FRESH-WATER SHELL HEAPS ON THE ST. JOHN’S. 
_ As stated, the extreme southerly point reached by the writer 
was Turtle mound, four miles north of Lake Washington. At 
this point the river is so obstructed by islands, formed from 
masses of floating plants, that further progress by the channel 
in any form of boat is impossible between that point and Lake 
Washington. Row boats, however, by making use of cut-offs, 
known to natives, can reach the Lake and go beyond without 
much difficulty. The river extends, after leaving Lake Wash- 
ington, to a point considerably south of the Sawgrass Lake, 
and very many trappers questioned by the writer were agreed 
that shell heaps are met with to the very source of the river 
and that on them-alone can camping places be found among 
the surrounding marshes. So universal was the testimony to 
this effect that the writer considers it safe to accept it. 
The most northerly fresh-water shell heap is presumably 
near Whetstone Point, nine miles north of Palatka. Prof. 
Wyman, though thoroughly acquainted with the river below, 
failed to find any shell deposits farther north, and the writer 
during sixteen seasons spent in Florida, of which much time 
was passed upon the river, has been unable to discover or to 
hear of any fresh-water shell deposits lower than Whetstone 
Point. A large number of persons familiar with the river in 
every capacity have been questioned; some perfectly ac- 
quainted with the shell heaps farther south, but no clue as to 
the existence of more northerly shell heaps has been gained. 
Until proof to the contrary be adduced the northern limit 
of the shell heaps must be considered as stated above. And 
this gives rise to an interesting question—why on the ninety- 
one miles of river below Whetstone Point are no shell deposits 
found? Some of the most advantageous places of abode on 
the river are met with north of Palatka, while tributary 
streams are abundant. The writer has found ampullariz at 
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