70 PP. EEPORT OF PROGRESS. FONTAINE & WHITE. 



tire flora of the Coal Measures, has a considerable resem- 

 blance to Sphenopteris nummularia, Gutb., and aj^proaches 

 still more nearly to Pecopteris pinnatifida, (Gutbier) Gein. 

 which, as is known, is a rare Permian plant. 



It is found also at Cassville at the same horizon, and here 

 the forms showing distinct pinnules on tlie ultimate pinnae 

 are more common. PL XIX, Fig. 6, represents a more 

 finely divided form. 



F. Ger7nai% Variety crassinerms. PL XX, Fig. 5. 



Fig. 5, plate XX, represents a form of Pecopteris so closely 

 allied to P. Germari, that we have thought it best to con- 

 sider it only as a variety of this species. It is distinguished 

 from the typical form by its very thick nerves, which are 

 shown slightly enlarged in Fig. 5a. 



The pinnules have also a crenulated border, and the whole 

 plant differs somewhat from P. Germari. Better and larger 

 specimens may show it to be a distinct species. 



It is found associated with P. Germari in the roof shales 

 of the Waynesburg Coal, at West Union, W. Va. 



P. Germari, Variety, cusiyidata. PL XX, Fig. 4. 



Figs. 4 and 4a, Plate XX, represents another form, al- 

 lied to P. Germari, and found at West Union in the rich 

 store of plants afforded by that locality. This plant dif- 

 fers considerably from the forms on which the typical spe- 

 cies is founded. 



The lobes of the pinnules are tipped with sharp, rigid 

 teeth, which, in part at least, are due to the prolongation 

 of the nerves beyond the jiarenchyma of the pinnules. 

 These are usually three or four in number in each lobe. 

 The most divergent forms have but a slight resemblance to 

 P. Germari, but there are so many intermediate forms that 

 we cannot separate it as a distinct species. It is found in 

 the roof shales of the Waynesburg Coal at West Union, 

 West Virginia. 



Pecopteris sub-falcata. Sp. nov., PL XXI, Figs. 1-2. 

 (Frond bi]3inate ; x^rimary pinnae large, triangular in out- 



