b 
These determinations only differ from those of Mr. Dun, quoted above, 
in the absence of Phyllopteris Feistmanteli (?). It seems probable, that the 
specimens which I have compared with T. Carruthersi are those which were 
previously doubtfully assigned to P. Feistmanteli. 
This assemblage of plants is quite insufficient for determining the age 
of the beds at Cockabutta Mountain. It may only be remarked that 
Tcinio'pteris Carruthersi, with which some specimens are compared, occurs in 
the Ipswich Series, of Upper Triassic (possibly R luetic) age, and doubtfully in 
the Walloon Series (Jurassic) ; and that the peculiar Tseniopteroid leaf 
described occurs in the Wianamatta Series (Upper Triassic), which is believed 
to be equivalent to the Ipswich Series of Queensland. 
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