172 FURTHER CONTRIBUTIONS TO THE FOSSIL FLORA. 
the associated form here is Zeugophyllites elongatus, (Morris). 
Vertebraria Australis (M‘Coy) the characteristic form at 
Southport has evidently disappeared entirely. It may be 
remembered that the earliest known habitat of Vertebraria 
Australis (M‘Coy) in Tasmania was discovered by the writer 
some years ago associated with an anthracite coal seam 
at Mount Cygnet. The beds at this place, like those further 
south at Adventure Bay, are intimately associated with the 
upper members of the marine mudstones of Permo-Carboni- 
ferous age, upon which they le conformably in unbroken 
stratigraphic succession. Both at Adventure Bay and Mount 
Cygnet the characteristic plants are of a Permo-Carboniferous 
character, consisting almost entirely of remains of Vertebraria 
Australis (M‘Coy) and Gangamopteris spathulata (M‘Coy). 
Dr. Feistmantel, at the time he published his last memoir, 
only knew of the existence of Vertebraria Australis (M‘Coy) 
in connection with the “‘ Newcastle beds (upper coal measures) 
of New South Wales at various localities,” which he refers to 
Permian age. It is significant to notethe gradual appearance 
and disappearance of Vertebraria Australis (M‘Coy), associated. 
at their origin by such a purely restricted Permo-Carboniferous 
form as Gangamopteris spathulata (M‘Coy) as at Adventure Bay 
and Mount Cygnet, and linked as it disappears with the 
beginnings of mesozoic plants such as Zeugophyllites at Ida 
Bay, and with the form Pecopteris Lwnensis (mihi), which 
latter serves to link together the Vertebraria shales of South- 
port with the prevailing P. Lunensis and Zeugophyllites 
elongatus shales of Ida Bay. It would seem probable, there- 
fore, that the Southport and Ida Bay formations supply an 
important link in the chain of plant life, connecting the close 
of the Permo-Carboniferous period with the beginnings of the 
mesozoic period; and the following may be taken as the 
sequence of the typical formations, taking in order the forma- 
tions in Tasmania, beginning with the lower marine beds of 
Permo-Carboniferous age, thus:— 
Formations. Characteristic Form, 
g3| 1. Lower Marine Beds. 
>| 2. Tasmanite Beds. Tasmanites punctatus. 
: 2 3. Coal Measures: Glossopteris, Gangamopteris, Noeggart= 
g S| Mersey, Henty, Tippagory, etc. thiopsis. 
= &| 4. Upper Marine Beds. 
mi | 5. Adventure Bay Coal Measures. Gangamopteris spathulata & Vertebraria 
= eI 6. Mount Cygnet Coal Measures. ry. Pe aaa ; ae ‘ 
ertebraria Australis an ecopteris 
S| 7. Southport Beds. Ties. 
8. Lower Sandstones (Lower Ganoid Fishes. Vertebraria. 
. Mesozoic). 
v | 9. Ida Bay Coal Measures, Pecopteris Lunensis and Zeugophyllites 
g elongatus. 
= |10. Upper Coal Measures: 
g Jerusalem, Fingal, Spring Hill Pecopteris. 
= York Plains, Hamilton, Richmond) Alethopteris, Thinnfeldia. 
New Town, Sandfly, Recherche Sagenopteris, Neuropteris. 
South Cape, Longford, ete. Zeugophyllites, Baiera, etc. 
