PLATE XXIV. 



Pecopteris dentata Brongn. 

 (Page 75.) 



, 1. Pinnje witli pinnules of ordinary form and size. U. S. Nat. Mus., 5643. 

 la. Photographic enlargement of portion of tlie same. x2. 

 lb. Similar enlargement of same, showing lamina convex between the nerves. The photograph 



is inverted in the plate. x2. 

 2. Fertile pinnie of the species, seen from the upper surface. U. S. Nat. Mus., 5739. 



Aloioptebis eeosa Gutb. sp.? 



70.) 



Fig. 3A. Portion of secondary pinna with large pinnules. The specimen was identified as Pecopteris 

 erosa Gutb. by Professor Lesquereux. Lacoe collection, U. S. Nat. JIus., 23S6. 

 SAa. Enlarged detail from the same fragment, showing dentition and nerves forking below the 

 middle. x2. 



Annul ARIA stellata (Sclilotli.) Wood. 



(Page 159.) 



Fig. 3B. Verticils with rather short leaves, on the left of Fig. 3. Lacoe collection, V. S. Nat. Mus., 

 2386. 



Sphenophyllum Lescurianum D. W. 



(Page 182.) 

 Fig. 3C. Obscure specimen ; shows frequent branching. Lacoe collection, U. S. Nat. Mus., 2386. 

 358 



