466 NOTES ON THE TEN THOUSAND ISLANDS. FLORIDA. 
the soil. These picks are seldom found entire, though implements of the same 
shell with the columella much worn away are abundant. It is likely that picks, 
after a certain amount of wear, were used as hammers. 
The next implement to be considered, a heavy Fulgur perversum of moderate 
size, differs from types heretofore described in that there is a hole for the handle, 
back of the columella, and a notch on the right as shown in Fig. 22, illustrating a 
Fic. 22.—Implement of shell, Mellvaine's Key. (Height 5.5 inches.) 
specimen from Mellvaine's Key. Usually when a notch is present it is on the left 
of the shell. A number of examples similar to the one shown in the figure, how- 
ever, were met with by us on Mcllvaine’s Key and elsewhere. There is no hole 
in the upper part of the shell for a thong or fiber to pass through, and none is 
needed in this instance as attachment can be made directly to the columella. 
An interesting implement is a Fulgur perversum with no perforation for a 
handle below the shoulder, or periphery. There is, however, in addition to the 
