404 Berry: Mesozoic FLORA OF ATLANTIC COASTAL PLAIN 
apex, and narrowly cuneate base or compound through the de- 
velopment of opposite lateral lobes. Axial vascular strand very 
stout below, becoming very thin and finally disappearing apically. 
When lobate, subordinate opposite vascular strands form the 
axis of the lobes, and these are usually but not always lost before 
reaching the tips of the lobes by giving off innumerable secondary 
branches. Margins are in all cases rather remotely undulate- 
crenate and the tips are all rounded. Secondaries numerous and 
thin, diverging from the main axis of the phylloclad on the axis 
of the lobes at very acute angles, curving outward, either simple, 
more often dichotomously forked, and occasionally several times 
forked. Lobes when present separated by cuneate narrowly 
rounded sinuses which terminate some distance from the main 
axis. The largest specimen, which is still incomplete at both the 
apex and the base, measures 8 cm. in length and 5 cm. from tip 
to tip of the lower lobes, the upper entire portion measuring about 
1.5 cm. in width. 
These remains are superficially like fern fronds, especially in 
specimens that are compound, and were it not for the presence 
in the Cretaceous of other Phyllocladus-like remains with a 
demonstrated gymnospermous structure (e. g., Androvettia) their 
reference to this genus would seem hazardous. The entire speci- 
mens are strikingly like some of the forms of Protophyllocladus 
subintegrifolius (Lesq.) Berry of the Raritan and Magothy forma- 
tions, or like Protophyllocladus polymorphus (Lesq.) Berry from 
higher western American horizons, and even the compound speci- 
mens have an unlobed apical portion of comparable length which 
is also similar in appearance to the two species just mentioned. 
The compound forms are superficially like Thinnfeldia rhomboidalis 
Ettings.,* the type of the genus Thinnfeldia, whose systematic 
position has been the occasion of so much controversy and which 
has been variously regarded as a fern, a cycad, or a conifer. The 
present species shows important differences, however, aside from 
its much younger age, and it is confidently believed to be unrelated 
to the various older Mesozoic species of Thinnfeldia that have been 
described 
It may also be compared with various forms from the Upper 
Cretaceous of Dalmatia which were discussed at great length by 
Kerner, t who refers them: to the genus Pachypteris. This he 
*Ettings. Abhl. Geol. Pf ECIREES 3: 2. pl..4, f. 4-7. 1854. 
} Kerner, Jahrb. Geol. Reichsanstalt 45: 39. 1806. 
