— 555 — 
times enlarged portion of the same rock, Pl. IX, Fig. 6a. The 
false nerves, are regular parallel, and may be individually traced 
for considerable distances. These nerves are probably deeply hypo- 
dermal and their disclosure is due to the state of maceration in the 
leaves. 
The recognition of the presence of fals? nerves between the true 
nerves in Noeggerathiopsis Hislopi removes one of the principal distin- 
ctions regarded as separating Cordaites from Noeggerathiopsis, and 
tends to establish a probability that both are generically identical. The 
similarity of the Cardiocarpon forms in the Brazilian shales to those 
related to Cordates in the Northarn Permo-Car)oniferous reinforces the 
argument for their union. But, on the other hand, if the inflorescence- 
baaring scale leaves described as Arberia which I suspect of having 
horne the Cardiocurpon (Samaropsis) Seixasi, really belong to Noegge- 
rathiopsis, as Voistmantel was inclined lo believe, thara is no possibi- 
lity thatthe Northern and Southern leaves are congeneric, the broad 
flabellate dissected Arberia, with its dicholomizing lohes, being conspi- 
cuously distinct from the spicate, bracteate Antholithus. If the spe- 
cimens just described are not identical with Noeggerathiopsis Hislopi, 
as I have regarded them, we must conclude that the genus Cordaites has 
itself invaded this region before the Barro Branco coal was laid down. 
It must be remembered that species of Cardiocarpon (Samaropsis) 
are associated with Noeggerathiopsis in the Karharbari heds of India (1). 
Another feature also common to the Cycadofllices and Cycads 
consists of the presence of very small subspherical or thickly 
discoid smooth granules deep in the lamina bet\ween the nerves. I 
have observed this in but a single specimen of Noeggerathiopsis 
Hislopi, not well shown in Fig. 7. Similar granules, perhaps glandular 
in their nature, or possibly merely sclerotic bodies, are sometimes 
seen in the leaves of Milssonia polymorpha, (2) Taentopterts (8) Neu- 
ropteris, (4) Alethopteris, (5) and Megalopteris. (6) The four genera 
last named are Pteridospermic. 
(1) See Feistmactel, Fl, Gondwana Sysbl., vol. III, p. 59, pl. xxviii, fig. 5. 
(2) See Nathorst: Bidvay till Sveriges Foss. Fl., pt. 4, £876, pl. viii, fies. 12, 13, 
(3) Sellards, Kansas Univ. Quart., vol x, no. 4, 1901, p. 5, pl. 1, fig. 6. 
(4) Newropterisn. sp., Lesquereux ; Lacoe Collection, U. S. National Museum. 
(5) Rept. Geol. Surv. Ohio, vol II, palaeont,, 1373, p. 42, pl. L, fig. 3. 
(6) Specimens of AMegalopteris Harti Anilr., Meyalopteris dentata Lx,, in the fossil 
plant collections of the U.S, National Museum. 
