PLATE XIX. 



SPHENOPTERIS PINNATIFIDA Lx. Sp 

 (Page 45.) 



Fig. 1. Photograph of the original specimen, a portion of which was illustrated in fig. 9, pi. Iv, of 

 the Coal Flora as SjilienoiHeris iridactijlites. The greater portion of the rock, to the left, is 

 covered by a fertile segment ; a sterile fragment is on the right. Lacoe collection, U. S. 

 Nat. Mus., 4304. 

 la. Enlarged detail from the sterile pinnre on the right in the same specimen. x4. 

 1ft. Similar enlargement of' reduced fertile pinnule to show sporangia. X4. 



Sphenopterts cf. Graa'enhorstii Brongn. 



(Page 50. ) 



Fig. 2. Fragment of doubtful specific identity. U. S. Nat. Mus., 5720. 



2a. Enlarged detail of pinna to show margins and nervation of pinnules. X2. 



Sphenopterts Brittsii Lx. 



(Page 53.) 



Fig. 3. Pinnae showing rather strong, rugose, ventrally depressed rachises. U. S. Nat. Mus., 5703. 



SPHENOPTERIS ILLINOISENSIS D. W. 



(Page 58.) 



Fig. 4. Terminal portion of pinna. XJ. S. Nat. Mus., 5697. 



ia. Enlarged detail of pinnule of the same showing simple, very oblique lobation. x2. 



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