— 465 — 
Sigillaria australis n. sp. 
Pl. vi, Fig. ll, lla lld 
Cortex in low topography, essentially Leiodermarian, extremely 
finely shagreened in a generally vertical direction between the some- 
what distant leaf scars; leaf cushion very poorly defined, large, 
broadly rhomboidal, the transverse diameter nearly one third 
greater than the vertical, round along the lower border, flattening 
near the more or less acute, sometimes acuminated lateral angles, 
slighty emarginate at the middle of the upper border, laterally cari- 
nate, and distant from one another in the same spiral alittle iess 
than the oblique diameter of the cushion, leaf scar at or near 
the upper side of cushion very broadly rhomboilal or elliptico- 
rhomboidal, nearly crescentic below, acute or somewhat broadly 
pointed laterally, the upper flanks straight near the angles, 
arched, and shallowly indented at the middle, the vertical diameter 
being a little less than one half the horizontal; nerve trace neur 
or «a little above the center of the scar; lateral cicatricules close 
to the nerve trace, large, oblong, and somewhat elongated verti- 
cally appearing very large, and oval, crescentic, extending across 
the greater part of the height of the scar in the subepidermal 
phases. 
The specimen photographed in pl. vi., Fig. 11, isthe sole repre- 
sentative of the species in the collection. It is nearly completely 
flattened and slightly macerated beneath the epidermis so that the 
cushions are often difficult of definition, while the cuticle appears to 
have been slightly dislocated in places. 
Though lacking distinctness as to bolster forms and ligular pit 
the fossil presente certain striking as well as interesting features 
which render it easily distinguished specificaly. The aspect of the 
cushion varies much in different parts of the fragment. 
As compressed in the lower left of the specimen it resembles in 
outline an enormously large Sigillarian leaf scar. In a few instan- 
ces the flattened and obscure bolster topographically suggeste the 
apron of Asolanus. 
The form of the leaf scars is seen on theright in the photograph 
and in the details, Figs. 11b,candd. Where best preserved they 
are pointedat the lateral angles though in other instances they are 
