lO SIE J. W. DAWSON ON THE MESOZOIC FLOE AS OF 



the collections from the North Branch, North Fork, Old Man River. The two species are 

 also associated in the Lower Cretaceous of G-reenlaud. 



TAXODiUiU CUNEATUM, Newberry. (Plate II. Fig. 8.) 



Newberry, Later American Floras. 



A small specimen referable to this species occnrs in the collections from the Kootanie 

 series. The species is described by Newberry from the Cretaceons of the west coast, and 

 occurs in the coal measures of Vancouver Island. 



4. Incertœ Sedis. 

 Taontjkus incertus, S. N. 



It seems doubtful if the objects referred to the above supposed genus of Algir, are 

 really organic or only concretionary. They have, however, evidently commended them- 

 selves to collectors in the west as probably fossils. The species in the present collection 

 may be described as oval, with one deep furrow, and curved striœ proceeding to the mar- 

 gins. It may be a frond, a concretion, or the cast of a burrow like the Rusichnites of the 

 Lower Silurian.' 



Collected by G. M. D. 



II. — Intermediate Series. 



The plants thus indicated are from beds on the Middle Branch of the North Fork of 

 Old Man River, supposed to be separated by a considerable interval of barren strata 

 from the beds of the Kootanie series proper. They have afforded numerous specimens of 

 the fern Asplenimn Dickwniamim, also roots of Equiseta, with rounded tubercles, and branch- 

 lets of conifers which resemble Glyjdostrohus Groeidandiais, Heer, and Taxodium cnnecdum, 

 Newberry. But their most marked characteristic is the occurrence of two species of 

 Dicotyledonous leaves, which constitute in this region the earliest ascertained indications 

 of plants of so high organisation. 



Sterculia vetustui,a, S. N. (Plate III. Fig. 2.) 



Leaf small, coriaceous, palmately three-lobed, lobes oblong, pointed, middle lobe one- 

 third larger than lateral lobes ; margin entire ; a strong mid-rib in each lobe ; nerves 

 obsolete. Length about 4 centimetres. 



I regard the generic name assigned to this leaf as entirely provisional. It has been 

 <i-iveu merely on account of its resemblance to leaves so named by previous writers. Such 

 a leaf might have belonged to a plant referable, were its llowers and fruit known, to a 

 very different group from to which Sterculia belongs. 



Collected by G. M. D. at North Branch, North Fork, Old Man River. 



Laurus crassinervis, Dawson. (Plate III. Figs. 3, 3a.) 

 Trans. Roy. Soc. Can., Vol. I. Sec. IV. p. 23. 



' These are the so-called Iixi.'<ophycu-^ of authors, and have recently been reclaimed by Saporta and connected 

 with Triiziana ; but I have elsewhere in my Paper on Kusopliycus (Canailian Naturalist), and in that on Footprints 

 of Aquatic Animals (Silliman's .Iiiurnal), advanced what I consider conclusive reasons to show tliat both Rusich- 

 nites and C'ruziana are casts of furrows or trails of crustaceans and annellids. 



