PLATE XXIII. 

 Aloiopteris Wxnslovii D. W. 



(Page 72.) 



Fig. 1. Small ultimate pinnie, in whicli the pinnules are but partially separated, the nerves forking 

 once at a wide angle, more than halfway from the rachis to the margin. U. S. Nat. Mus., 

 5721. 

 la. Enlarged detail of the same, showing dentition and nervation. x2. 



2. Macerated pinnfe, revealing skeletonized nervation of the same species. It will be noted 



that the nerves fork only above the middle. U. S. Nat. Mus., 5611. 



3. Enlarged detail, showing pinnules and nervation of another specimen of the same species 



U. S. Nat. Mus., 5612. x2. 



4. Fragments of fertile pinuie of J. Winalovii. U. S. Nat. Mus., 5690. 



5. Portions of fertile secondary (?) piume of the same species. The reduced fertile pinnules 



are obscure, the margin obliterated by the projecting elongated sporangia. A fragment 

 of sterile pinna, with large pinnatifid pinnules is seen in the upper part. U. S. Nat. Mus., 

 5689. 



Aloiopteris erosa Gutb. sp.? 



(Page 70.) 



FiCt. 6. Ordinary pinme, below the average in size. U. S. Nat. Mus., 5614. 



6rt. Enlarged detail from same, showing character of margin, and nerves forking below the mid- 

 dle at a not very wide angle. x2. 



356 



