232 OLDER MESOZOIC FLORAS OF UNITED STATES. 
‘In the Report of the State Geologist of New Jersey for 1885, page 96, 
the following paragraph occurs: 
\ 
The recent discovery of a stratum full of impressions of the plant Schizoneura 
(Calamites) planicostata (Fontaine), in the red shales near Doylestown, Pennsylvania, 
by Mr. E. C. Pond, and of bivalve mollusks in those near Phoenixville, Pennsylvania, 
where also a deposit containing cycads is reported, taken with the finds above noted, 
suggests that the floraand fauna of the Triassic may be richer than hitherto supposed, 
and encourages further search. 
In the Annual Report of the Geological Survey of Pennsylvania for 
1887 Mr. A. Wanner! describes supposed vegetable remains from 
the red sandstones of York County, in the vicinity of Goldsboro, 
and figures three specimens on pl. xiii. He regards them as repre- 
senting alge of a very ancient type, and proposes for this form the 
name Ramulus rugosus. As we shall presently see, Mr. Wanner fol- 
lowed up his investigations with great success. 
Mr. Benjamin Smith Lyman, in the several papers already cited 
(supra, p. 218), does not seem to have made any fresh contributions 
to the Triassic flora of Pennsylvania, and is content to enumerate the 
plants that had already been reported, and to use some of them as 
proofs of the Paleozoic age of certain beds previously regarded as 
Triassic. 
Mr. Frederick Ehrenfeld, of Philadelphia, a student atthe University 
of Pennsylvania, presented to the faculty, in 1898, a thesis? which was 
the result of a somewhat careful study of the Triassic beds in the 
vicinity of York, and virtually the same as those in which Mr. Wanner 
had been working, as it seems independently and without knowledge 
- of the work of Mr. Ehrenfeld. 
In this paper (pp. 10-15) Mr. Ehrenfeld enumerates half a dozen 
fossil plants that he had found in the Trias of that section, and had 
himself identified. They are: Jacroteniopteris magnifolia (Rogers) 
Schimp., Chetrolepis Muenstert (Schenk) Schimp., Batera Muenster- 
dana (Presl) Heer, Loperia simplex Newb., Mertensides bullatus (Bunb.) 
Font., and Zguisetum Rogersti (Bunb.) Schimp. 
As above remarked, Mr. Wanner continued his researches, and 
reached the results which are here published for the first time. Before 
completing his work he made two visits, in April and May, 1899, to 
Washington, bringing with him a part of his material, and carefully 
comparing it with the type specimens at the National Museum. He 
finally concluded to turn over his manuscript and drawings to the 
"Director of the United States Geological Survey for publication, and 
they were referred to me to edit and see through the press. After 
correspondence with Mr. Wanner it was decided to send them, as also 
1The discovery of fossil tracks, alge, etc , in the Triassic of York County, Pennsylvania, by Atreus 
Wanner: Ann. Rept. Geol, Survey of Pennsylvania for 1887, Harrisburg, 1889, pp. 21-35: 
£A Study of the Igneous Rocks at York Haven and Stony Brook, Pennsylvania, and their Accom- 
panying Formations, by Frederick Ehrenfeld; Philadelphia, 1898; pp. 1-24, 1 plate. 
