FOSSIL PLANTS. 423 



This appendage, which is not observed in any other species, passes up 

 the rachis to the point where the decurrent lobes join it. This peculiar 

 margin gives the name to the species. 



This plant has a general resemblance to Sphenopteris artimesiasfolia, 

 Sternb., on which Schimper has founded the genus Eremopteris, but 

 differs from it principally in the lobes of the pinnae, which in E. artime- 

 siasfolia are more elongate and wedge-shaped, while in this plant, with 

 the same nervation, the lobes are very distinctly pointed. 



Fig. 2 represents a more macerated form of the plant. 



Locality the same as the last. 



Lepidophloios Lesquereuxii (sp. nov.). 



Plate 53, fig. 3. 



Stem or cone covered with rather small, rhomboidal, imbricated scales 

 of nearly equal breadth and depth, measuring about seven millimeters in 

 each direction. The upper part of each scale depressed, as in Lepido- 

 phloios, the depression bordered below by a curved transverse ridge, from 

 the middle of which descends a similar longitudinal ridge, on each side 

 of which is a small oval cicatrix. A single similar cicatrix is seen in 

 the center of the upper depressed space. If this depressed space was 

 ever tripunctate, this feature is not now discernible. One of the scales 

 is uncovered in its lower portion; and shows an apparent fibrous or 

 woody structure. It does not appear to be the striated axis of a cone. 

 The specimen, however, as a whole, has a strong resemblance to a cone. 

 It is unlike any species of Lepidophloios I have seen, and still less like 

 any form of Lepidostrohus. The figure represents the natural size. 



Locality same as the last. 



Lepidodendron Rushvillense (sp. nov.). 



Plate 53, flg. 4. 



Cicatrices rhombic (almost square), with the lateral diagonals slightly 

 longer than the vertical, very close together. There are three oval de- 

 pressions a little above the middle of scar; two of them in a horizontal 

 line, and the other placed centrally a little above. Another circular de- 

 pression appears near the upper corner of the cicatrix, and transverse 

 wrinkles in the lower part. The figure of L. tetragonum, given by Stern- 

 berg, is very indistinct, and that given by Dr. Dawson, in Fossil Hants 

 of Lower Carboniferous and Millstone Grit, Canada, does not correspond to 



