256 



TRANSACTIONS OF THE 



NOTICE OF FOSSIL VEGETABLE REMAINS FROM THE BITU- 

 MINOUS COAL MEASURES OF PENNSYLVANIA, BEING A FOR- 

 TION OF THE ILLUSTRATIVE SPECIMENS ACCOMPANYING 

 MR MILLER'S ESSAY OR GEOLOGICAL SECTION OF THE 

 ALLEGHANY MOUNTAIN, NEAR THE PORTAGE RAILWAY. 

 By R. Harlan, M. D. &c. 



Pecopteris obsoleta. 



Geological position — Shaly sandstone of the bitumin- 

 ous coal measures. 



Loc. — Vicinity of Johnstown, Pennsylvania, western 

 base of the Alleghany mountains. 



Cab. of Geol. Soc. of Pennsylvania. Also, Cab. Acad. 

 Nat. Sc. of Philadelphia, from the anthracite coal mea- 

 sures of Wilkesbarre, Pa. 



This specimen forms part of the series of illustrative 

 specimens which accompanies the valuable essay of Mr 

 E. Miller on the geology of the • Alleghany mountain 

 at the Portage Railway. In several respects, this spe- 

 cies bears considerable analogy with the Pecopteris 

 cistii, Ad. Brongniart, Hist, des Veg. Foss., pi. 106, 

 with the following characters: P. foliis lanceolatis bi- 

 pinnatis; pennis elongatis obtusis, abrupte desinentibus, 

 pinnula terminali brevissima elliptica vel subrotunda; 

 pinnulis ellipticis vel suboblongis, basi connatis vel usque 

 ad basin discretis, etiarave basi paululum contractis ; 

 pinnula infirma rachi pennarum inserta, vix alteris ma- 

 jori; nervo medio valde notato; nervulis arcuatis bis 

 furcatis, distantibus, tenuissimis.^' With this descrip- 

 tion it will be only necessary to draw the distinctive 

 characters of the present species, which consists of 

 a single specimen 4 inches long in the stalk, and 1| 

 inches wide between the extremities of the leaves, 



