94 PP. REPORT OF PROGRESS. FONTAINE & WHITE. 



per' s, and seems to possess more woody material in its 

 ribs. Our plant is found associated with Pecopteris tenui- 

 nervis, thoiigii it has never been seen attached to any plant. 

 The frond and segments show no distinct nerves. Along 

 the axis of the plant we find a sort of woody rib, which 

 sends obscure ribs into the lobes, which dissolve in stria- 

 tions. The texture is fleshy. The Eremopterid facies and 

 obscure nervation cause the plant to resemble the hue Glei- 

 cJienites Neesii of Goeppert, from the Permian of Europe. 



Schimper figures* his plant as attached to the stipe of P. 

 dentata. 



Habitat.— Roof shales of the Waynesburg Coal, Cassville, 



West Virginia. 



RhacophyUitm laciniatum. Sp. nov., PL XXXV, Fig. 2. 



(Frond, simple, smooth, tapering rapidly to the base or 

 point of attachment, and presenting a cuneate outline ; la- 

 ciniae, numerous, not deeply incised into the frond, and 

 mostly simple, but in some cases again cut into segments ; 

 nervation, not very distinct, nerves diverging fiabellately 

 from the base, forking frequently, branches passing into 

 the laciniae.) 



This plant is most nearly allied with R. filiciforme 

 (Gutb.) Schimp. but is less coriacious, and the nerves are 

 more distinct. It is found attached to Pecoptei'ls dentata. 



Habitat. — Roof shales of the Waynesburg Coal, Cassville, 

 West Virginia. 



RhacryphyUum laduca, (Sternb.') Schimp. 



In the roof shales of the Waynesburg Coal, at Cassville, 

 West Union, W. Va. and at Carmichael's, Penn. we find 

 large specimens of this plant. It seems to have^been quite 

 fleshy. 



Rhacophyllum speciocissimum, Schimp. (Schizopteris 

 lactuca, (Presl.) Roehl.) 



We find several specimens of this splendid plant at Car- 

 michael's, Penn. in the roof shales of the Waynesburg 



