244 OLDER MESOZOIC FLORAS OF UNITED STATES. 
of the same species, showing leaflets narrower and more delicate than those of the 
form he depicts. It, however, evidently belongs to the same species. The form given 
by Mr. Wanner may be taken asthe type. It has narrower leaflets that are uniformly 
narrow, not more than 1 mm. wide. None of them are entire. The greatest length 
seen is4cem. They go off from the midrib at an angle of 45° and are inserted on its 
side after the position of C. Braunianum. 
Mr. Wanner has made the following note: 
The lower part of the leaf, its apex, and the tips of the leaflets are wanting. 
Enough, however, remains to present very clearly the characteristics of Clenophyllum 
Braunianum. The long, narrow leaflets, slightly expanded at the base, are attached 
throughout their entire width to the rachis. The closely placed nerves, about six in 
number, are parallel. 
The few other specimens found strikingly duplicate the one illustrated in its essen- 
tial features. In one the leaflets are not more than one-half as wide. 
Locality.—N. C. R. R. cut, south of York Haven. 
Genus DIOONITES Miquel. 
Dioonires CaRNALLIANUS (GOppert) Bornemann. 
Pl. XXVIII, Fig. 2. 
1843. Pterophyllum Carnallianum Gopp.: Uebersicht schles. Ges., 1843, p. 130, pl. i, 
fig. 4. : 
1856. Dioonites Carnallianus (Gopp.) Born.: Ueber organische Reste der Lettenkohlen- 
gruppe Thiiringens, p. 56. 
This plant was regarded by Mr. Wanner as Ctenophyllum Braunia- 
num and classed with the one represented by Fig. 1 of Pl. XXIX. 
Professor Fontaine regards them as different. Of this one he says: 
Schenk, in Foss. Flor. der Grenzchichten, pl. xxxix, fig. 4, gives a representation 
of a plant which he calls Pterophyllum Carnallianum, but which Schimper regarded 
as a Dioonites. This fossil seems to be identical with one of the specimens consid- 
ered by Mr. Wanner as Ctenophyllum Braunianum. The Pennsylvania fossil has 
broader leaflets and stronger nerves than any form of C. Braunianum. The speci- 
men is the terminal portion of a leaf, not, however, retaining the tip. The length of 
the fragment is 14cm. The midrib of the leaf is stout and rigid, showing a maxi- 
mum width of 3mm. It has narrower leaflets, none of which are entire. The 
largest fragment hasa length of 6em. The leaflets toward the summit are narrower 
and seemingly shorter. They are set on the midrib at a very large angle (75°-80°) . 
The texture of the leaflets seems to have been thin, and they have the same width 
from base to end. Their width is about 3mm. The nerves could not be made 
out satisfactorily. This specimen isa finer one than that figured by Schenk. 
Mr. Wanner says of it: 
Fig. 2 is marked by a somewhat abrupt shortening of the leaflets near the apex, 
after which their length remains about the same. The leaflets are terminated by 
rounded tips and striated by closely-placed parallel nerves, about one-third of a milli- 
meter apart. It is difficult to trace the nerves to the point of insertion in the rachis, 
but they seem to be parallel throughout their extent. 
Fragmentary specimens from the Little Conewago Creek, evidently belonging to 
