1 1 8 FLORIDA GEOLOGICAL SURVEY ELEVENTH ANNUAL REPORT. 
In regard to other forms from one mile south of DeLand the 
following may be said : 
Phacoides waccamawensis Dali, new subsp. delandensis. The size of the 
shells compares with P. tuome.yi Dali, and the sculpture with waccamawensis 
Dali. The latter species is not reported lower than the Pliocene in Florida. 
Divaricella quadrisulcata d’Orbigny. This species has been reported from 
the Pliocene of the Carolinas, but not from the Florida Pliocene. 
Corbula inaequalis Say, var. A. The DeLand forms are more character- 
istic of the known Miocene of the Carolinas. A similar form is found at Or- 
ange City, Fla. 
Corbula inaequalis Say, var. B. The DeLand forms are closely related to 
those at Wilmington and Cronly, N. C. ; and at Orange City, Fla. 
Area transversa Say. DeLand forms have much lighter shells and lower 
beaks than those of the Caloosahatchee Pliocene, and are closely related to the 
forms at Cronly and Neill’s Eddy Landing, N. C. ; and are similar to the 
Pleistocene forms found at Simmons Bluff, S. C. 
Mulinia lateralis vars. A. and B. and contracta Conrad from DeLand are 
probably varieties of the same species as the forms grade into each other. The 
shape of the shells somewhat resembles congesta Conrad, and might be so iden- 
tified by some authors, but owing to the lightness of the shell and the weak 
hinge articulation, they appear nearer lateralis than congesta. 
Similar forms are found mile south of DeLeon Springs and 
near Orange City, Fla. 
The Caloosahatchee Pliocene forms are somewhat lighter and 
have a more distinct carinated dorsal posterior ridge and more 
truncated edges. 
A report of the stratigraphic section and of a small fossil collec- 
tion, which was identified by Dr. Vaughan, made at Orange City, 
Fla., about five miles south of DeLand marl pit, is as follows :* 
“One-fourth mile south of the railroad station at Orange City there is an 
exposure of marl which is doubtfully referred to the Pleistocene, though 
further collections may show it to be Pliocene. 
The section at this locality has a thickness of about 18' feet, but only the 
lower part is fossiliferous. 
Unassorted white sand 3 feet 
Stratified hard white sandy clay 3 feet 
Well stratified ferruginous sand and clay 5 feet 
Yellow to white marl, very fossiliferous 7 feet 
Total 1 8 feet 
* Matson, G. C., and Clapp, F. G., Second Annual Report, Fla. Geol. Surv., 
1909, p. 149. 
