ps Sia 2 ca all hig 8 ala 
Se See fo eae ree Rae eek, ee 
‘\ ae 
of Mississippi and Alabama. 35 
in the Grand Gulf group of my Report; and the “large oyster” 
overlying marl and limestone, mentioned in the same Webi is 
not O. Georgiana, but the Grypheea repeatedly referred to. As 
for the Vicksburg lignite, it is but one of the many lignitic 
seams constantly Pan intercalated between the marine stages 
of the Mississippi Tertiary. Finally the Port Hudson strata, 
observed by Carpenter and Lyell, are either the highest of the 
Grand Gulf group, or form part of the (probably Post-pliocene) 
formation underlying the Mississippi delta—the ‘‘ Coast Plio- 
cene” of my Report. 
Hale (this Jour., [2], vol. vi, p. 856) goes so far as to identify 
with the Bashia creek lignite, beds occurring near Natchitoches, 
and on the Trinity, Colorado and Brazos rivers, in 'Fexas. 
I shall not here reiterate the reasons and data given in my 
Report (p. 109) in support of my opinion that the whole of my 
“Northern Lignitic” is of the lowest Eocene age, having noth- 
ing new to add 'to what is said there on the subject, and by Dana. 
(Manual of Geology, p. 510.) Ina late letter, Lesquereux informs 
me that according to the specimens he has examined, there must 
be a considerable difference of age between the Winston strata 
marked ¢ in my general section (Miss. Rep., p. 108) and those 
marked ain Tippah, and that the former appear to be newer, 
probably Pliocene. Had the conclusion been the reverse, it 
ee have been more readily reconciled with stratigraphical 
nee. Winston county adjoins Neshoba, where, as in Lau- 
detiale, the Lignitic unequivocally dips beneath the siliceous 
Claiborne strata, and the locality ¢ is on the same parallel with 
the marine outlier of the Claiborne age, in Caroll and Attala, 
Between locality c and the edge of the siliceous Claiborne strata 
in Neshoba and Lauderdale, the outcrops continue in unbroken 
succession and aniformity of character; there is nothing to indi- 
cate the superimposition of a limited Pliocene basin upon the 
most ancient Eocene, here, any more than between loc. a in Tip- 
hand 6 in Lafayette cpap iy; which latter Lesquereux is also 
inclined to consider of later 
I hope to se able, ei to submit to the experienced 
hands of Lesquereux more complete sets of specimens from these 
and other lapelssics situated nearer to the recognized Eocene, 
with a view to the solution of the aproresuing problem regarding 
the correspondence of ancient and modern floras on the 
yet eh aa 
tis the continuation of these lowest lignite beds of Lauder- 
dale which, in the map accompanying Tuomey ’s first Alabama 
Report, is intended to be represented by a narrow band of brown 
tint, skirting the Cretaceous on the south, across the state. Tuo- 
mey was not certain of its eastward limit, and it would appear 
from the notes of Mr. Thornton, appended to Tuomey’s second 
