1879.] 1 3 9 ECrosby. 
of the common species V. alticosta from the same formation. There 
are at least three species of Ostrea; the smallest, averaging about an 
inch long, appears to be identical with O. divaricata Lea, from the 
middle Eocene of Alabama, though possibly the young of O. sellae- 
formis Con., a characteristic form of the Lower Eocene of Alabama, 
South Carolina and Virginia. Another species, occurring principally 
in fragments, and the most abundant fossil which the rock contains, 
may be the common and little characteristic O. virginiana. While 
the third form, which is represented by a single fragment, must have 
been very large, the shell being at least two inches thick, and con- 
sisting of laminz or layers one-eighth of an inch thick. A smooth 
and regular Anomia about seven-eighths of an inch in diameter re- 
sembles A. tellinoides Morton from the Cretaceous of New Jersey, 
Alabama and Mississippi; and a small Plicatula with about eight 
very regular, triangular ribs is certainly near P. jilamentosa Con., 
from the Eocene of Alabama. A small, smooth, circular and 
abundant Pecten is probably Camptonectes calvatus Con., |:eretofore 
known only from the Middle Eocene of South Carolina. Pec- 
tunculus-like shells, too fragmentary for certain identification, are 
near, if not the same with, Axinwa staminea Con., Eocene, Alabama. 
Another member of this family resembles the Miocene Striarca cen- 
tenaria. Among the shells which I have only been able to determine 
generically are also a thin, circular Cardium about one and a half 
inches across; at least two species of Yoldia or Nuculana; a small 
Corbula; and of Gasteropods, several small Turritella-like species 
and asmall Natica; and besides these there are numerous minute 
forms of both univalves and bivalves of which I can make nothing 
at present. Echinoderms are represented by several slender and 
sharp-ribbed Cidaris spines; and Celenterates by a simple, eylindri- 
eal, Galaxea-like coral, with cells five to ten mm. in diameter, but 
differing from the genus named in the curious reticulation and co- 
alesence of the vertical partitions. ‘Two cells only have been ob- 
served, and these are separate. 
Although much yet remains to be done in the way of identifying 
these fossils, yet the few forms that I have made out seem to place the 
Kocene age of the material beyond reasonable doubt. Mr. Upham’s 
account of the way in which the fragments occur, it will be observed, 
shows at once that they are of pre-glacial origin, and that they have 
not been transported by human agency, but are genuine drift ma- 
terial; from which we may infer that the parent bed, if not entirely 
———— a a 
i Mee ge 
