430 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



22. Sphenophyllum Schlotheimii. {Lindl. ^Hutt. Foss. Fl. 



vol. i. t. 27.) 

 Agrees exactly with the figure and description in the ^ Fossil Flora/ 

 and with the British specimens in the museum of this Society. 



23. Sphenophyllum erosxjm. {Lindl. ^ Hutt. Foss. Fl. vol. i. 



t. 13?) 



I am not quite certain that this is the Spk. erosum of Lindley and 

 Hutton, but it perfectly agrees with British specimens so named 

 (from Staffordshire and Pembrokeshire) in the Society's collection. 

 It is observable, that in this species the veins constantly terminate in 

 the teeth of the leaves, whereas in the preceding they uniformly end 

 in the sinuses between the teeth. The leaves of our 8ph. erosum are 

 always sharply toothed, and more or less deeply, according to their 

 situation on the stem : the upper leaves have very short teeth ; those 

 lower down are more deeply, and in a manner doubly, toothed, the 

 alternate sinuses being deeper ; lower still, the leaves are divided 

 more than half-way down, and sometimes almost to their base, into 

 two or more segments, each of which is deeply toothed. These lat- 

 ter leaves, when they occur separately, might easily be supposed to 

 belong to a distinct species. 



24. Lepidodendron elegans. {Bro7ign. Veg.Foss. vol. ii. t. 14. 



Lindl. ^ Hutt. Foss. Fl. vol. ii= t. 118.) 



Seemingly a very common plant in the Sydney coal-field. The 

 specimens sent from thence agree entirely with those collected by 

 Mr. Lyell in Alabama. The areoles are in general rather narrower 

 and more elongated than is usual in the Northumberland specimens, 

 or than they are represented in the figures referred to ; but this is 

 evidently a variable character. 



25. Lepidodendron gracile? {Brongn. Veg. Foss. vol. ii. 1. 15 ? 



Lindl. ^ Hutt. Foss. Fl. vol. i. t. 9.) 



There are some specimens among those sent by Mr. Brown from 

 Cape Breton, and others procured by Mr. Lyell from the same coun- 

 try, which seem to agree with the figures of this supposed species, 

 above-quoted ; but I can find no characters whereby to distinguish it 

 from L. elegans. It seems to be merely a small variety or a young 

 state of that plant. 



26. Lepidodendron — . 



An impression, in sandstone, of a large Lepidodendron with much- 

 elongated contiguous areoles of a nearly lanceolate form, tapering to 

 a long narrow point at each end, about 2 inches long, and scarcely 

 more than y^ths of an inch broad ; their margins slightly raised and 

 thickened ; a very conspicuous ridge running the whole length of 

 each areole. The leaf-scars are nearly obliterated. 



27. Lepidodendron undulatum ? ? 

 A very indistinct impression in a coarse sandstone. 



