84 



SIE .T. WILLIAM DAWSON ON THE 



Pecopteris Browniana (Dunker.) (Fig. 3.) 





Fig. 3. — Pecopteris Brmimiana. 



Single pinnae occur in the Anthracite collections which are not distinguishable from 

 this species, which is found both in the European Wealdeu and the American Potomac, 

 and is nearly allied to P. borealis, Heer, from the Lower Cretaceous of Greenland. The 

 name Pecopteris is of course provisional, and if the fructification were known it would, 

 no doubt, be referred to some more modern genus. ' 



Cladophlebis falcata, (Fontaine.) (Fig. 4.) 



Fig. 4. — Cladophlebis falcala. 



This provisional genus was established by Saporta and Schimper to include a 

 number of ferns mostly Jurassic, and characterized by being pinnate with spreading 

 pinnie, the pinnules attached by the Avhole base, the apex pointed or obtuse, sometimes 

 dentate, especially toward the apex, which is often turned upward, giving a falcate form. 

 The midrib is strong but fading away into nerves toward the apex. Nerves at acute 

 angles with the midrib, usually forking once or twice. The well known Pecopteris Wliit- 



' Trans. Royal Society of Canada, Vol. IV., Sec. IV., 1890. 



