Geology. 435 
itat, being given in parallel columns, with well-chosen remarks upon 
i as and uses appended in foot notes. 
The Palzontological part, noting that all the coal-beds of the State 
appear to belong to the lowest member of the Coal-formations, briefly 
mentions the characteristics of different beds examined, and deser ribes 18 
new species of plants from their overlying shales, and oe 50 
others which have been elsewhere found. Leaves of upp 
Magnolia, of a Rhamnus, and of a Quercus, are paesires poe — 
from a tertiary deposit. 
2. Prof. Heer’s reply to Dr. Newberry on the Age of the Nebraia 
Leaves.—The article of | Dn Newberry in this Journal, xxx, p. 278, having 
a few days ago come to my notice, calls for an answer from me, although 
it is with great unwillingness that I enter me controversy. 
The point of dispute is known to be on the plants discovered in Ne- 
braska. Dr. Newberry had remarked in arate to them (cf. On the 
this “lige [2], vol. xxvii, a ; ‘the species of your fossil plants are 
g, that according to my views, the two last named 
genera were not correctly defined, and ‘that the rest of the genera, quoted 
by Dr. Newberry are represented in the Tertiary and not in the Creta- 
ceous, On this Dr. Newberry founded his charges, which, though 
answered already by Mr. Leona eet he repeats again. I allow myself 
to reply to them as follow: 
1. In relation to the Uindamia Dr. Newberry seems now to admit, that 
the leaves from Reyer cannot be assigned to this genus, as he himself 
Says: it may prove a new genus. In fact, all the characteristics of 
Credneria are wan Sadie n these leaves, (to wit: those fine lateral veins, 
those of Populus leuce, ste > n this pie © I had not only 
examined the drawings of Sena and ut also fine leaves 
of that species which were sent to me from Bog nasco and Sieblos, The 
margin of these Jeaves is only sparingly dentate or even entirely toothless, 
and also only slightly wavy or undulate. I cannot agree to Dr. Newberry’s 
Ettinghausenia any more than in regard to the Credneria. - the leaves 
of this genus, w ich are known to me, are serrate or denta' 
manica, M.) I have a representation in my work on the flora of Skopau 
(cf. Beitriige zur Flora des sachs, Braunkohlen). A comparison of the 
drawin ings of the Nebraska leaf (in the Proceedings Acad. Nat. Sci. Phil- 
