Bd. III: 14) 
THE MESU/OIC FLORA. 
61 
obtuse but very narrow pinnæ, which are more or less but not strongly falcate. 
There is thus a considerable difterence between the specimens referred to this spe- 
cies; but there are rather characteristic features common to them all, which speak 
strongly for their specific identity. In all specimens the pinnæ have evidently been 
very thick, and have a distinct margin, apparently thinner than the rest of the la- 
mina. This margin is least distinct in the specimen shown in 
fig. 16, of which the attribution to the present species is per- 
haps a little doubtful; nevertheless it was in this specimen that 
it was first observed. The venation is best seen in the frond 
shown in figs. 14 and 15. It consists of bifurcating and .some- 
what diverging, rather prominent veins. (See text-fig. 14. Fig. 
15 a, pi. 7, is somewhat misleading in regard to one important 
character, the margin, which is very distinct in the specimen, 
being omitted.) 
Z. pachyphylliis displays no great resemblance to any other 
species. Habitually it recalls some forms of Otosamitcs; but it 
is distinct!)’ a Zaniites, the base being symmetrical, equally 
rounded at both corners and not auriculate. It is not certain whether there is a 
callosity at the base or not. From all other species of Zamita and of most other 
related genera it difters in the thickness of the pinnæ and in the occurrence of a 
distinct margin. A somewhat similar feature is found in representatives of other 
genera, such as Otozaiuites (cfr. SCHENK 1867, pi. 34, fig. 8) and Anoinozamitcs 
(A. marginatns, NathorST 1876, pi. 12, figs, i — 3); but in those instances the mar- 
gin is thicker than the rest of the lamina. 
Fig. 14. Zamiles pacltv- 
phvllus n. sp. — En- 
larged portion of pi. 7, 
fig. 14, 3 I, 
Genus Oiosamites Fr. Braun. 
For remarks on the delimitation of the genus, see Zainites^ p. 54. 
Otozamites linearis n. sp. 
PI. 7, figs. 1 — 4, S, 9, II; text-fig. 15. 
Under the name of Otozamites linearis n. sp. I have joined, after some hesita- 
tion, a large number of fronds presenting considerable differences among themselves. 
The specimens shown in pi. 7, figs, i — 4, and especially in text-fig. 15, represent 
the more common and typical form, and .should be regarded as the type-specimens 
of the new species. Those figured in pi. 7, figs. 8, 9 and ii, dift'er in several re- 
spects and belong perhaps to a distinct species. There are transitional forms, 
however; and it is probable that the specimens last mentioned represent young fronds. 
