FOSSIL PLANTS. 457 



Lepidophyllum aurlculatum, Sp. nov. PI. 36, fig. 6. Blade 

 long, lanceolate, pointed, a little enlarged in the middle, mark- 

 ed by a broad, medial nerve, bearing at the base two small, 

 round auricles ; pedicel of the sporanges thick, ovate, enlarged 

 under the blade, a little obtuse at the base. Found at Neely- 

 ville, Morgan county. 



Genus Lefidophlotos, Brgt. Stem cylindrical, bark covered 

 with scales, or by the persistent base of decayed leaves, and 

 marked with broad, rhomboidal scars. The relations of this 

 genus are not well ascertained. 



Lepidophloyos obcor datum, Sp. nov. PL 41, fig. 1 and 2. 

 Scales lanceolate, truncate, inflated in the middle ; scars of the 

 decorticated surface, cordiform, obtuse, overtopped by button- 

 like, round, small crowns, corresponding with the base of the 

 scales. The specimen originally showed the under part of the 

 bark; but by removing accidentally the coat of clay upon 

 which the impressions are marked, the scales were discovered. 

 (Fig. 1, specimen from Duquoin.) Fig. 2 is from a smaller 

 specimen found at Colchester — coal No. 3. In this one the scars 

 have nearly the same general outline, dilated on both sides, 

 obtuse below, showing above a vascular scar about of the same 

 form, marked by three horizontal points. 



Genus Knorria, Sternb. and Gopp. Stems tree-like, bearing 

 basilar conical remains of nearly imbricated, or closely and 

 spirally placed leaves. 



Knorria imbricata, Sternb. Vers., 1, p. 37, Chester group. 



FIFTH DIVISION.— STEMS OF FERN TREES. 



Genus Megaphytum, Artis. Stem tree-like, apparently large, 

 furrowed, dotted, marked by large scars of a horse-shoe figure, 

 left by the base of the petioles of large fronds and placed in 

 two or more parallel rows. This definition is somewhat modi- 



58 Nov. 1, 1SC61 



