87 
plants. But from the present material it is not possible to decide to wliicli 
special plant it may belong’; we can perhaps judge of it only by the fre- 
quency of its occurrence together with one or the other equisetaceous plant; 
and here we would get Schizoneurci for India, and Phyllotheca for Australia, 
although in India it may partly belong to T J lvjllotlieoa also, and might also 
belong to Trizygia. Schimper, in Zittel’s “ Handbuch der Petrefakten- 
kunde” (1880, II Bd. 2 Licf.,p. ISO), doubts of its connection, as a rhizome, 
with Trizygia, but docs not suggest any other explanation. 
The remains of Vertebraria present themselves generally as flatly 
compressed longitudinal stems and branclilets, which in the middle arc 
longitudinally split, or which show an axis there ; the lateral portions arc 
quasi- jointed, but so that the joints do not quite regularly correspond with 
one another. In cross section we see wedge-shaped segments. 
Amongst the Indian plants I have also observed some specimens with 
what I believe to be the outer surface, as shown in my paper on some 
Itaniganj Plants [loo. cit., Tab. XV, Pig. 3). In India there also occur 
specimens with branching-off branclilets in the form of rootlets, while I have 
observed nothing of tire kind amongst the fossils of Australia. 
O O 
Besides the species from the Newcastle beds there have been described 
two species by Tenison Woods from higher beds. 
A doubtful Vertebraria (?) pctschorensis has been also described by 
Prof. Sclimalhauscn, in his “ Bcitrage zur Juraflora Russlands” (toe. cit. 
ante), from Oranetz, on the right bank of the Petscliora River, in the 
Petscliora country. 
Vertebraria australis, IP Coy. 
PI. XIV, Fig. 0 ; PI. XV, Figs. 1-3. 
Literature same as above. 
Ohs. — On P3. XV, Pig. 1, there is a specimen from Bowenfels, west- 
ward of Sydney, which contains two steins ; that one to the left is a flat, 
longitudinal impression of Vertebraria, reminding us of Dana’s Clasteria ; 
the other, to the right, is a large stem, showing partly the longitudinal, partly 
the cross section of the species. Pigs. 2 and 3 represent specimens of Dana’s 
original Clasteria australis, which, however, as distinctly apparent, belongs to 
Vertebraria. On PI. XIV, Pig. G, is M‘Coy’s original figure of Vertebraria 
