PSEU. 



804 



Pseudopecopteris sillimani. Lesq. (Pecopteris silli- 

 mani, Bgt.) Geol. 111. IV, p. 401) Coal Flora, p. 206, pi. 87. 

 fig. 3 ; under Campbell's Ledge conglomerate, Pittston, Pa.; 

 Mazon Creek nodules, Illinois ; also by White at bottom of 

 Powelton shales, over coal B, Broad Top, Fa. (T3, p. 62) XII, 

 Xlll, Note. Lesquereux said in 111. Kt, 1870, that it is one 

 of the rarest species in American coal measures. 



Pseudopecopteris speciosa, Lesq. Coal Flora, page 216, 

 plate 51, fig. 1, a fine species closely related to P. latifolia and 

 P. acuta^ of Brongniart, and to P. nervofa^ Brongt., but diff'er- 

 ing from all three by its large leaflets ; found m the Alabama 

 low coal at Helena. — Recognized doubtfully by Lacoe in Koch's 

 collections (July, 1889), at the Tipton Run mines, Blair Co. Fa. 

 from a bed assiged by me to the Pocono formation. — X? XII ^ 



Psilophyton cornutum Lesquereux. Proceedings of the 



American Philoso- 

 phical Society, Phil- 

 adelphia, 1877. Col- 

 lett's Indiana Re- 

 port of 1883, page 

 78, plate 3, fig. 2, 

 Lower Helderherg 

 sandstone of Michi 

 gan ; fragments also 

 in Upper Silurian 

 strata in Canada. — 



Psilophyton elegans, Dawson. Acad. Geol, 1868, page 



Dawson. 



542, fig. 185 B ; surface smooth with very delicate wrinkles ^ 

 fructification in groups of small, broadly oval scales, borne on 



