1877.] 545 [Ashburner. 



Shale and sandstone (Nos. 139 to 13(3 inckisive) 5 feet 9 



Sandstone (Nos. 135, 134, 133) 17 " 10 



Shale (Nos. 133 to 128 inclusive) 4" 



Sandstone and shale (No. 127) 15 " 



The sandstone and conglomerate, throughout the whole series, seem to 

 alternate with the beds of shale as shown in the following grouping : 



Shale 51'- 



Sandstone 122' 



Shale 83' 



Sandstone 38' 



Shale 2Q'f^^^' 



Sandstone 40' 



Shale 5' 



Sandstone 15' 



Throughout the upper member of this Pocono or Vespertine Formation 

 No. X, and the coal-bearing strata of the middle member, remains of a 

 terrestrial vegetation are more or less abundant both in the sandstone, 

 shale and slate. The following genera and species have been determined 

 by Prof. Leo L?squereux in specimens collected from the debris at the 

 west end of Sideling Hill Tunnel : 



1. Sphenopterls flaccida (Crepin), a new species for America but recently 

 discovered in Belgium, stage of the Psammites du Condroz, which corres- 

 pond to the upper part of the Catskill (IX) of Pennsylvania ; for the same 

 formation has still a Psilophyton and Palaeopteris hybernica. 



2. A species of Ulodendroa with scar leaves obsolete. It seems to be 

 quite near to if not identical with Ulodendroa maj us (Sternb.), a species 

 found in the sub-conglomerate coal of Alabama, but ascends to and above 

 the Conglomerate. 



3. KnorrUi acicularis Gopp, from the transition measures of Silesia. 

 It is new for this country but passes by decortication to the following: 



4. SUgmaria niinuto Lesq. First Geological Report of Pennsylvania, 

 Plate XVI, fig. 1 and 2, from the Pocono (Vespertine) of Mauch Chunk. 



5. A branch referable to Stlgmatocanna Wolkmannuina Gopp, but not 

 positively ascertainable, the bark of the tubercles being destroyed. 



6. A Lepidodendron (?) in four twisted and compressed fragments, so 

 much deformed that the outlines of the scars are not discernible. 



Nos. 1 and 4 are the more predominant species and are represented by 

 many fragments. 



"The specimens were very hard to study and determine, as they are 

 twisted in many directions and the vegetable fragments covered with a 

 coating of coal as hard as graphite. ' ' 



3. The lower ynember in its general character bears some resemblance to 

 the upper member in as far as it is mide up of alternations of sandstones 

 and shales. 



