!00 CATALOGUE OF FOSSIL PLANTS 



189. — Lepidodendron acideatum, Sternb. 



Impression of the network of vascular vessels which surround 

 each leaf -scar. The casts of the leaf -scars very distinct, 

 somewhat rhomboidal, and the apical parts on a line through 

 the centre of the scar. Near the centre is the impression of 

 two small oval scars placed below the central one. This 

 specimen is probably a portion of the, -remains of an old large 

 stem of L. selaginoides, and shews the impression of vessels 

 within the outer cortex. 

 Loc. — Shale above the Bensham Seam, Jarrow. (H. C. 377). 



190. The specimen shews numerous impressions of the vas- 

 cular bundles running and forming a regular network between 

 the leaf-scars. This belongs to the form designated by Stern- 

 berg and others L. acideatum, but is merely the impression of 

 very old leaf-scars of L. selaginoides. 

 Loc— Shale above the High-Main Seam, Gosf orth. {H. C. 378). 



191. — Lepidodendron selaginoides, Sternb., L. et H. Type Specimen, 



F. F., pi. 12. 

 A large branch with three smaller branches, two on the right 

 side and one on the left ; the upper branchlet on the right 

 bifurcated ; the lower on the right seems to throw off several 

 smaller branches, which bifurcate once or twice before attain- 

 ing their full length. These branchlets are covered with the 

 straight, stiff pointed narrow leaves so characteristic of this 

 species. The foliar impressions on the larger branch are suffi- 

 ciently distinct to shew the narrow lozenge-shaped scars, with 

 a central depression which distinguish it easily from L. Stern- 

 bergii. The lower branch on the right side is much injured 

 by a tool mark, and the foliar scars on the small branches are 

 too scale-like in the figure, which is not so accurate as could 

 be wished. The impressions of the leaf-cushions on the large 

 branch are not so perfect as in Hutton's figure. 

 Lor. — Shale above the Low-Main Seam, Felling. (H. C. 368). 



192. Two small terminal branches are shewn bifurcating from 



a larger branch. The outer cortex not preserved, but traces 



of leaf-scars can be made out. 



Loc— Shale above the Low-Main Seam, Felling. (H. C. 366). 



193. Portion of long branch, seventeen or eighteen inches 



long, with elongated lozenge-shaped leaf-scar, with central 

 puncture or depression. Leaves on the slab of shale long, 

 with distinct mid-rib and sides running. The lines of scars 



