1894.] Shell Heaps of Florida. 17 
sweet budding upon sour orange stock. After this is accom- 
plished it becomes necessary to place the trees in line and to 
remove many that no tree may be deprived of sunlight. For the 
remoyal of trees and for the “ lining” of others, pits three feet 
in depth are necessary. It is well, therefore, to bear in mind 
that implements unquestionably of the shell-heaps must be 
found at a depth greater than three feet in sweet orange 
groves, and over eighteen inches from the surface in shell 
deposits not utilized for the cultivation of the orange. The 
writer, while handling the spade in an orange grove at St. 
Figure 1.—Grooved Sandstone Hone. (Actual size). 
Francis, found at a depth of three feet a thin and beautifully 
proportioned arrow head, evidently of the time of the later 
Indians, and conversely he has seen upon the surface in 
orange groves, arrow points unquestionably of the time of the 
shell-heaps. ~ 
2 ; 
