16 PROCEEDINGS OF THE GEOLOGICAL society. [June 9, 
found in strata of yellow loam, sand and marl on the Pearl river and 
in the banks and beds of one of its tributaries. The other shells 
xs : 
a Fig. 2 
ae : 
_— 
22 5 ~ 
Be Bis 83 
Ze rS) & 
_ = a o 
a> S =~ 
DZ 
Length of section 50 miles. 
- Mud of alluvial plain of Mississippi. 
. Superficial drift. 
. Freshwater loam with land shells, &c. 
. Eocene strata. 
. Cretaceous strata. 
om ODD 
collected by me at the same place, several of them I believe identical 
with Claiborne species, belong to the genera Voluta, Oliva, Terebra, 
Rostellaria, Murex, Umbrella, Natica, Turritella, Crepidula, Den- 
talium, Corbula, Mactra, Lucina, Cytherea, Cardium, Cardita, Pee- 
tunculus, Nucula, Pinna, Pecten and Ostrea. With these are many 
corals, teeth of fish, &c. I was shown the remains of Zeuglodon pro- 
cured from the neighbourhood at a place five miles south of Jackson 
on the right bank of the Pearl river, but as I did not visit the loca- 
lity, I cannot point out the precise place in the Eocene series in which 
it occurs. Some of the accompanying corals however were the same 
specifically as those occurring with the shells above-mentioned at 
Jackson, and one of my informants stated that this Zeuglodon bed 
was immediately under “‘ the rotten limestone.” 
Nov. 5, 1847.—Since the above was read to the Geological Society, 
I have seen two papers on the Vicksburg deposits by Mr. Conrad, 
the first in Silliman’s Amer. Journ. 2nd Ser. July 1846, No. 4, p. 
124, the second in the same Journ. Sept. 1846, No. 5, p. 210, which 
I had previously overlooked. Mr. Conrad had not visited Jackson, 
Mississippi, but his results in regard to the fossils of Vicksburg, of 
which he evidently obtained a larger collection than mine, agree in 
the main with my own. I cannot however reconcile some of his state- 
ments in regard to the want of identity of species at Claiborne and 
Vicksburg, and suspect some errors of the press and of the dates of 
his two memoirs, no reference being made from the one to the other. 
Tn the first paper, p. 124, he affirms that not one species is common 
to Vicksburg and Alabama, yet he mentions Pecten Poulsoni, a Clai- 
borne shell, as abundant at Vicksburg with a Nummulite. In the 
second paper, p. 211, he says that ten species will be found on com- 
parison common to Vicksburg and Claiborne, Alabama. 
4. A letter from Grant Dalton, Esq., to the President, was then 
read, in which he mentioned that he had obtamed possession of a 
considerable part of the fossil tusk of a Mammoth brought up in the 
