warp] TRIASSIC FLORA OF YORK COUNTY, PENNSYLVANIA. 2387 
Genus ASTEROCARPUS Goppert. 
ASTEROCARPUS FALCATUS (Emmons) Fontaine. 
Pl. XXII, Fig. 3. 
1856. Pecopteris falcatus Emm.: Geological Report of the Midland Counties of North 
Carolina, p. 327, pl. iv, fig. 9. ‘ 
1856. Pecopteris carolinensis Emm.: Op. cit., p. 327, pl. iv, figs 1, 2. 
1857. Pecopteris falcatus Emm.: American Geology, Pt: VI, p. 100, pl. iv, fig. 9. 
1857. Pecopteris falcatus variabilis Emm.: Op. vit., pl. iv, fig. 5. 
1857. Pecopteris carolinensis Emm.: Op. cit., p. 100, text fig. 68, pl. iv, figs. 1, 2. 
1883. Asterocarpus virginiensis Font.: Older Mesozoic Flora of Virginia, Mon. U. 8. 
Geol. Survey, Vol. VI, p. 41, pl. xix, figs. 2, 2a,.3-5; pl. xx; pl. xxi, 
figs. 1, la, 1b, 2; pl. xxii; pl. xxiii; pl. xxiv, figs. 1, 2, 2a. 
1883. Laccopteris Emmonsi Font.: Op. cit., p. 102, pl. xlviii, figs. 6, 7. 
1883. Laccopteris carolinensis (Emm.) Font.: Op. cit., p. 102, pl. xlix, figs. 11, 12, 12a. 
Only one important pinna of this plant seems to have been found. 
Mr. Wanner figured it and says that the figure shows part of a frond 
not referred to any genus because of insufficient data. The nervation 
can not be discerned, nor were any other specimens of its kind found. 
Professor Fontaine seems to have found the specimen, and remarks: 
This seems to be a fragment, with small pinnules, of Asterocarpus virginiensis. At 
least such a fragment of that fossil occurs among Mr. Wanner’s plants. 
Locality._N. C. R. R. cut, south of York Haven. 
Genus TASNIOPTERIS Brongniart. 
TNIOPTERIS? YORKENSIS Fontaine n. sp. 
Pl. XXII, Figs. 4-6. 
Professor Fontaine’s treatment of this species is as follows: 
In Fig. 4 of Pl. XXII Mr. Wanner depicts a long, narrow leaf as a form of Macro- 
teniopteris magrifolia. A careful inspection of this specimen convinces me that it is 
not M. magnifolid. It is, I think, a Teniopteris, but as the leaf is imperfect and there 
is only one specimen of it, Ido not positively identify it as such. ‘If it be one, it is 
the first of the genus found in the Older Mesozoic of the Atlantic States. The fol- 
lowing points indicate that it isa Tzeniopteris: The length is great for a leaf of ‘its 
small width, and the width changes little throughout. The midrib is strongly defined 
and prominent, unlike the vaguely defined, flat midrib of M. magnifolia. No form 
of M. magnifolia as narrow as this ever attained such a length. It reminds one 
strongly of some of the Teeniopterids of the Oroville Jurassic flora. It may also be 
compared with T. ltenuinervis Brauns. The nerves, however, seem to be finer and 
closer than those of the latter plant. 
Fig. 5 of Pl. XXII represents a plant that certainly is not M. magnifolia. It prob- 
ably is the same with the plant represented by Fig. 4. 
Fig. 6 of Pl. XXII may represent a smaller form of the same plant, or it may be 
Pseudodaneopsis reticulata Font. [P. plana (Emm.) Font. ] Provisionally the plant 
given in Fig. 4 may be called Tzniopteris? yorkensis. It comes from York Haven, 
N. C.R. BR. cut, as do the forms depicted in Figs. 5 and 6. 
