PLATE XXXIII. 



Pecopteris vestita Lx. 



(Page 91.) 



Fig. 1. Pinna of ordinary form, tapering gradually toward tbe apes. U. S. Nat. Mus., 5685. 



lo. Pinnules of same enlarged. The villo-sity of the surface is not shown in this or Figs. 2a and 5a. 

 X2. 



2. Common form of pinnatifld pinua of this species. U. S. Nat. Mas., 5647. 



2a. Enlarged detail from the same to show nervation. The villosity of the pinnules is not 

 represented. X2. 



3. Young piume. U. S.Nat. Mus., .5683. 



4. Apical portion of secondary (?) pinna. Characteristic slender tapering apex. U. S. Nat 



Mus., 5646. 

 4a. Pinnules of tbe same enlarged to show the Tillosity. X2. 



5. Portion of secondary (?) pinna, showing lateral pinnse with pinnules a little larger than those 



figured in pi. xxxi of the Coal Flora. U. S. Nat. Mus., 5684. 

 5a. Detail of pinnules of 5684. The marginal crenulation is exaggerated. X2. 



6. Pinna of same species, showing tapering form. U. S. Nat. Mus., 5688. 



Pecopteris cf. arborescens Brongn.? 



(Page 78.) 



Fig. 7. Specimen with mostly simple nerves, doubtfully referred to the above species. U. S. Nat. 

 Mus., 5686. 



