DESCRIPTION OF SPECIES. PP. 37 



The tendency of the leaflets to unite near their insertion is 

 a feature peculiar to our plant. 



Habitat — Roof Shales of the Waynesburg Coal, Cassville 

 and AVest Union, West Virginia, 



Sphenoj^hyllum Jillculmis, Lesqx., PI. I, Fig. 8. 



Fig. 8, PI. I, represents S. Jiltculmis, Lesqx., "Geol. of 

 Penn.," vol. II, part 2, Plate I, Fig. 6 : It is one of the best 

 cliaracterized sj)ecies of Sphenophyllum in the entire Car- 

 boniferous flora, always having its lower pair of leaflets 

 shortened, and deflexed along the stem. 



This plant is quite abundant at the horizon of the 

 Waynesburg Coal. We find it in the roof shales of this 

 bed at Cassville, West Union, and Carmichaers. It seems 

 to be confined to this horizon, as we have never seen it 

 above or below this coal bed. The name Jillculmis is not 

 well suited, as we find it with stems often an v thing but 

 thread-like, they being half a cm. wide. Prof. Lesquereux 

 has informed us by letter, that he intends to change the 

 name in his forthcoming "Carboniferous Flora," which he 

 is preparing for the Geol. Survey of Pennsylvania. 



The occurrence of the plant at widelj^ separated locali- 

 ties with the constant feature of depressed, shortened leaf- 

 lets, precludes the idea that this is a consequence of any 

 accidental distortion. 



Splieno^jhyllum denslfoliatum, Sp. nov., PI. I, Fig. 7, 



Stems, rather slender, containing numerous closely placed 

 whorls of leaflets ; whorls containing four leaflets ; leaflets 

 narrowly oblong-cuneate, united in pairs for a short space 

 above the point of attachment, cut at the extremity into 

 two short, closely approximated lobes, which have each 

 two teeth ; nerves single in the base of each leaflet, forking 

 near the insertion, and each l^ranch forking again a short 

 distance above, and sending a long branch into each tooth 

 at the end of the leaflet. 



Habitat. — Roof shales of the Waynesburg Coal, Cass- 

 ville, West Virginia. 



