Khao. 



872 



species ; hardly suspected of being a fern were it not for the 

 Parkeria lerns; comparable with Dictyophyllum rugosum, 

 Lind. and Hutt., but certainly not a thistle. Lesq. Also Coal 

 Flora, 1880, p. 318, pi. 57, fig. 2, from Missouri Coal measures. 

 Salem anthracite vein at Pottsville, Pa. XIII. 



Rhacophyllum inflatum. {Hymenophyllites inflatus, 



Lesq. Illinois Report, Vol. 4, p. 414, plate 

 16, f. 6, 6a. Coal Flora, 1880, page 323, 

 plate 57, figs. 7, 8; unique specimen, sim- 

 ulating a Sphenopteris ; close to Hymen, 

 weissii of Schimper. Roof shale of Daquoin 

 coal, 111.) CoUett Ind. Rt., 1883, plate 15, fig. 9. Coal Meas- 

 ures. XIII 



Rhacophyllum lactuca, Stern. 



{ Schi^nptpris \ lactuca. 



^ Fucoi- 

 des cris 

 pus. 

 Gutb ; 

 Hymeno- 

 phyllites 

 lactuca 

 Lesq. 

 Geol. 111., 

 '^IV, 418; 

 Pachy- 

 phyllum 

 lactuca^ 

 Lesq. 

 Geol. Fa., 



_,_-,_.- 1858, p. 



L'^Sg4^S^:^a^^iypj^;it^^ /^^.^. rl. ^, l 863, plate 



8, tig. 4, 5, from Gate Vein, New FhiladeJphia, iSchuylkill Co., 

 Fa. Not scarce in the European and American coal measures. 

 Lesquereux has seen a iragment with leaves, or wings, at- 

 tached (?) to a broad common rachis, through which the forms 

 of underlying ferns could be discerned, showing how thin its 

 substance must have been. Coal Flora, 1880, p. 31 5. '' Whole 

 thickness of middle carboniferous measures," but rarely visi- 



