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centre of the segment and repeatedly dichotomous, several lateral veins, 
simple or dichotomous, passing direct from the racliis into the upper and 
under portions of the segment.” Carruthers does not think that this species 
is a Gleichenites. 
A further illustration and discussion of this plant is given by Mr. 
Crepin. lie compares his figures with those of Mr. Carruthers and Prof. 
Morris, and concludes that all represent the same plant; and this the more 
so as, on the same specimens from Tasmania, there occurred, together with 
Pecopteris odontopteroides, Morr., also another plant, viz., Sphenopteris 
elongata, Carr., in the same manner as Mr. Carruthers has also observed it in 
specimens from Queensland, which of course shows that both localities 
belong to the same formation. 
Speaking of the systematic position of this species, Mr. Crepin was of 
opinion that it should be placed in Odontopteris, and compares it especially 
with Odontopteris alpina, Gein., apparently because lie thought the speci- 
mens came from the Coal formation ; but this is not the case. I have 
mentioned before that Mr. Crepin himself noticed the identity of the species 
upon the specimens from Tasmania and Queensland, from which one can 
also judge of the identity of formations. Now, as shown before, the strata 
with Pecopteris ( Thinnfeldia ) odontopteroides in Queensland are of Mesozoic 
age ; so that also the beds in the Jerusalem Basin, from whence Mr. Crepin’s 
specimens have been obtained, have to be considered of the same age, which 
has, besides, already been shown in the preceding pages. 
Qardiocarpon aust rede, Carr., therefore, cannot even be considered as 
belonging to the Coal formation (Carboniferous), as Mr. Crepin believes, 
because it was also at first described from Mesozoic rocks in Queensland. 
With regard to Pecopteris odontopteroides, Mr. Crepin also mentions 
the dichotomy of the leaf, but does not consider it in any way as a specific 
character. Etheridge, in his “ Catalogue,” quotes this species as Pecopteris 
odontopteroides, but in the section “ Mesozoic.” In my first paper on 
Australian plants (1878) I placed it with Thinnfeldia, and I do not see any 
reason now for placing it elsewhere. We have thus a plant before us which, 
from the venation, belongs to the Odontopteridecc (or Neuropteridese), but 
not to the Pecopteridese. Prom Odontopteris this species differs by its 
venation, as the greater number of veins originate, as it were, from the base 
of a chief vein, and by the repeated dichotomy of the same chief vein, which 
