Bd. III: 14) 
THE MESOZOIC FLORA. 
1 1 
rassic of Queensland, D. Carlsoni Nath, from the Rhætic of Chile (SOLMS Laubach 
1899, p. 598) and an indeterminable fragment figured by KuRTZ (1901, pi. 3, fig. 5) 
from the Liassic of Argentina. None of these forms seems to be specifically identical 
with the Antarctic fragment. 
Genus Todites Seward. 
Todites Williamsoni (Brgn.). 
FI. 3, figs. 1 — 5: pi. 8, fig. I b. 
Pecflpteris WilUamso?iis, BrONGNIART 182S a, p. 57. 
Pccopteris whitbiensis, Brongniart 1828 a, p. 57. 
Pecopieriî Williamsonis^ Brongniart 1834, p. 324; pi. 110, figs, i and 2. 
Pecopteris whi/biensis, Brongniart 1834, p. 321; pi. 109, figs. 2 — 4. 
Todea Williamsonis, Schenk 18S4: pi. 15(3), figs. 3 — 3 b. 
Todea IVilliamsonii, Raciborski 1890, p. 3; pi. i, figs. 7 — 10. 
Tcdites IVilliamsoni, Sew.ard igoo, p. 87: pi. 14, figs. 2. 5 and 7: pi. 15, figs. l — 3; pi. 21, fig. 6. 
This species is represented by impressions of several well preserved fronds, in 
all respects resembling such from other Jurassic districts. Fig. i, pi. 3, shows por- 
tions of some pinnæ which must have belonged to a very large frond. The longest 
pinna preserved measures about 14 cm. without being complete. The shape of the 
narrow, linear pinnæ is the same as in typical specimens from Yorkshire. A similar 
close resemblance exists also in the shape and venation of the pinnules which are 
attached at an open angle and slightly falcate. The venation shows the characteris- 
tic double forking and spreading habit of the secondary veins. 
The occurrence of Todites Williamsoni in the Antarctic Jurassic flora is con- 
firmed by the presence of fertile fronds. Some such specimens are figured in pk 3, 
figs. 2 — 5. They agree in all particulars with fertile fronds from Yorkshire and 
other Jurassic districts in the Northern Hemisphere. The structure of the sporangia, 
which cover the whole lower surface of the pinnules, cannot be made out on account 
of the mode of preservation of the specimens; but the specific identity of the Ant- 
arctic and European forms is beyond doubt. 
Todites Williamsoni is known from many different districts in the Northern 
Hemisphere. In a fertile state it has been found in many localities in Eurasia, from 
England to Japan. It has been recorded from East Greenland (Hartz 1896, p. 232; 
pi. 12, fig. 4) but not hitherto from the United States, which have yielded only 
sterile fronds of the Todites Williamsoni-iyçt. The species is not with certainty 
known from the Gondwanas nor from any locality in the Southern Hemisphere. 
