New Species of Fossil Plants. 429 
acuminate both ends, one third of an inch distant; vascular 
scars marked only in the superior arched outline, perpendicu- 
larly crossed by a straight line, like an arrow on a bow; tu- 
bercles very large, oval, medial line deeply furrowed, obsolete ; 
intervals flat, undulately striate. 
T. Leprpopenpron pisTans (spec. nov.). Scars oval, 
lengthened, acuminate at both ends, half an inch distant, 
with the intervals undulately striate, flat; vascular scars rhom- 
boidal, square, three-pointed ; appendages double ; tubercles 
small, diverging ; medial line deep, transversely cut by broad 
short furrows. 
88. Lerimopenpron optusum (spec. nov.). Scars trape- 
zoid, acutely pointed above, slightly narrowed and abruptly 
obtuse below. Vascular scars nearly in the middle, rhomboidal, 
obtuse above, acute below, angular both sides, transversely 
three-pointed ; appendages irregular, distinct on one side only ; 
tubercles oval, diverging ; medial line wrinkled, margins one 
eighth of an inch broad, undulately striate and furrowed in 
their length. 
89. LEPIDODENDRON CARINATUM (spec. nov.). Scars oval- 
hexagonal, angular, lengthened acute at both ends, with nar- 
row keeled, smooth margins; vascular scars rhomboidal, ob- 
tuse above ; triangular below ; appendages short, obsolete, tu- 
bercles small oval, medial line obsolete, transversely fur- 
rowed. 
90. Lepipopenpron cryrEATUM (spec. nov.). Scars ir- 
regularly trapezoid, acute at both ends, obtuse on the sides, 
With narrow linear margins ; vascular scars large, obtuse above 
and below, enlarged and acute on both sides, transversely 
three-pointed ; appendages obsolete, converging on the very 
obsolete medial nerve, tubercles obsolete on one side, oval. 
91. Leprpopenpron SIGILLARIOIDES (spec. nov.). Scars 
exactly trapezoid, with the acute angles at both ends; margins 
narrow, linear, smooth ; vascular scars dilated, acute on both 
sides, transversely marked with three points, without any ap- 
"P nor medial lines nor tubercles. 
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