PLATE IX. 



Mariopteris sphenopteroides (Lx.) Zeill. 



(Page ;il.) 



Fig. 1. Portions of two sections of ;i primary pinna. The lower sijecimeii illustrates the heteromorphy 

 of the inferior pinn* and pinnules. U. S. Nat. Mus., 5709. 

 la. Enlarged detail of pinna showing heteromorphy and dentition. The teeth are generally 

 longer than is shown in the ligure, and the lamina of the pinnule is strongly convex 

 Ijctween the nerves. x2. 

 2. F"ragmeut from near the apes of one of the quadri-sections of the primary pinna. U. S. Nat. 

 Mus., 5710. 



Mariopteris (sp. uov.). 



(Page 33.) 



Fio. 3. Fragment very closely related to M. inflata, an unpublished MS.S. species of Dr. Newberry, 

 from Ohio. Lacoe collection, U. S. Nat. Mus., -4438. 

 3a. Enlarged detail of pinna from the same specimen. x2. 



Pseudopecopteris squamosa Ls. sp. 



with 



Excipulites Gallipteridis (Schimp.) Kidst. 



(Pages 15 and 27.) 



Fig. 4. Fragments of the Psendopecopteris sqmimoso, the pinnules of which are dotted by the fuugus, 

 ExcipulUes CaUiptericlis. No. 325 of the collection of Dr. J. H. Britts, Clinton, Missouri. 

 4a. Enlarged detail of pinnules of the same fern showing the fungus between the nerves. X2. 



328 



