1910] BERRY—EOCENE FLORA IN GEORGIA 203 
main body of the Claiborne deposits in Richmond County in a 
northwesterly direction for a distance of about eighteen miles. 
The plants are intimately associated with a few estuarine and 
shallow water marine invertebrates, such as Modiolus, Ostrea, 
Nucula, Leda, Cytherea, etc., which fully corroborate the age of the 
deposits derived from the study of the flora, where the data for 
correlation, in the absence of known Claiborne floras, consisted of 
comparisons with geographically remote floras like those of the 
Green River beds of Wyoming and those of the Paris basin and 
southern England. There are certain features, however, notably 
a marked indication of a rise in temperatures and increased humid- 
ity, which, in so far as they are known, characterize middle eocene 
floras everywhere. This is known to be the case in America, it 
is markedly shown in the floras of England and France, and is 
emphasized in the numerous late eocene floras from a large number 
of arctic localities. 
Among the forms collected from the Georgia Eocene are new 
species of Acrostichum, Arundo, Castanea, Conocarpus, Dodonaea, 
Ficus, Malapoenna, Momisia, Pisonia, Potamogeton, Rhizophora, 
Sapindus, Terminalia, and Thrinax, including the first fossil occur- 
rence of species of Conocarpus, Momisia, and Thrinax. 
The foregoing forms represent twelve families and include one 
fern, three monocotyledons, and ten dicotyledons. No gymno- 
sperms, which are usually represented in European Lutetien floras 
by at least the genus Podocarpus, have been discovered. It will 
be observed that only two forms, the Castanea and the Potamogeton, 
are not coastal forms, and the latter is an aquatic whose presence 
associated with coastal swamp or strand plants is not difficult to 
explain. The Castanea then apparently represents the only upland 
type preserved in this flora, and as it is not common, the presump- 
tion is strong that it was brought down to the basin of sedimenta- 
tion by some eocene river, most likely by the river which originally 
occupied the trough of the subsequent estuary. 
; Turning to the remaining twelve species, we may enumerate 
with Profit their closest allies in the existing flora. The Acrostichum 
1S Tepresented by A. aureum Linn., the Arundo by A. Donax Linn., 
the Conocar pus by C. erectus Linn., the Dodonaea by D. viscosa Linn., 
