42 BOTANICAL GAZETTE [JULY 
tendency to disappear in the layer above the pink formation, and 
although this stratum is very similar to the one just described, 
there occurs a change from the salmon to a decidedly reddish hue, 
which in turn gives place to the rusty brown plastic peat already 
described. A striking uniformity in the several layers appears out 
to about three-fourths of a mile from shore, where there occurs a 
gray formation below the pink, an exactly opposite sequence from 
that found in Lake Weir. The several probings (diagram, 31, 32, 
33, 39, and 40) showed that this laminated deposit varies in depth 
from a few inches at the border of the marsh to g feet a mile off 
shore, and when, too, the large area of this lake is taken into con- 
sideration, it is evident that, providing conditions:similar to those 
found in Lake Newnan obtain (diagram, cross-section, and descrip- 
tion above), there must be an enormous amount of allocthonous 
peat in Lake Harris. 
Lake Griffin, just north of Leesburg, shows external conditions 
very similar to those already described for Lake Harris. Between 
the broad saw grass marsh and the upland pine plains there appears 
a dense cypress swamp which occasionally gives place to a dense 
growth of hardwood trees, among which Magnolia glauca and 
Nyssa biflora are the most abundant. There also appears the 
usual fringe of floating Castalia. Tests were made about a mile 
from shore (diagram, 41) near a sinall island, where the floor proved 
to be of a sandy nature, a condition very habitual for shallow water 
lakes, owing to a more or less constant agitation by waves. 
Soundings near the shore of the mainland show a shallow deposit 
of allocthonous peat, which gradually grows deeper toward the 
border of the marsh. A series of samples taken just outside the 
range of the deeys water plants presents the following characters 
(diagram, 42 and 46). The deposit, unlike that found in Lake 
Weir and Lake Harris, is of a uniform deep brown quality, except 
for a stratum 2 feet from the bottom, in which the material is deep 
red, very loose in texture, and showing a tendency to break into a 
crumbling mass, in contrast to the more plastic claylike structure so 
commonly found in such deposits. The portion of the allocthonous 
layer above this red formation presents the usual deep brown plastic 
samples normally present in the upper strata of lacustrine peat. 
i 
