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. 



87. Lepidodendron distans (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. Lepidodendron obtusum (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. Lepidodendron clypeatum (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. Lepidodendron 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- 

 pendages, nor medial lines nor tubercles. 



