Mesozoic. | PALZONTOLOGY OF VICTORIA. [ Plante. 
ment would in that case be the lateral pinne ; the wider examples 
being probably more nearly basal than the narrower ones. As there 
is at present no direct evidence of this connection of the three types 
of form commonly occurring, it is necessary to describe them for 
the present under three distinct names for reference until evidence 
of their relation may be obtained. The netted neuration and want 
of midrib would indicate the nearest affinity in these respects to be 
with Gutbier’s Carboniferous genus Dictyopteris, which differs 
altogether in its more complex form and the auriculated base of 
the pinnules, a character never found in Gangamopteris. These 
Gangamoptert are the only fossils found as yet in the Bacchus 
Marsh sandstone, so that their association as originally observed 
by me with Glossopteris Browniana of the N.S. Wales coalfields is 
of value as indicating a Mesozoic age for this Victorian rock, the 
stratigraphical relations of which are not clear. 
This G. angustifolia is the form I first observed and described 
from the coal beds of New South Wales ; it is sometimes a foot in 
length and scarcely 1 inch wide. 
EXPLANATION OF FIGURES. 
Plate XII.—Fig. 1, moderate sized specimen, nearly perfect, natural size, showing the 
obliquely truncated broad sessile clasping base. Plate XIII.—Fig. 2, portion of smaller specimen, 
natural size. Fig. 2a, portion magnified to show anastomosis of neuration. 
Puate XIII, Fies. 1-la. 
GANGAMOPTERIS SPATULATA (McCoy). 
DrscripTion.—Spatulate, symmetrical, equal sided, semi-elliptically pointed 
above, tapering towards base to a slender petiole. Length, 44 inches ; width, about 
1} to 2 inches. 
This is by far the rarest of the three forms in the Bacchus Marsh 
beds. 
EXPLANATION OF FIGURES. 
Plate XIIJ.—Fig. 1, several rather small specimens on slab of stone, natural size, showing 
the regular ovate form and slender attenuated base. Fig. la, portion of surface magnified to 
show netted neuration. 
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