PLATE LXXIII. 



DiCEANOPHYLLUM? Sp. 

 (Page 272.) 

 Fig. 1. Photograph 8ho^yi^g aspect of a specimen doubtfully referred to the above genus, but which 

 may be Algoid in its nature. The fossil is somewhat macerated. A detail from the same 

 IS given in PI. XLI, Fig. 10. U. S. Nat. Mus., 6076. 



Lepidocystis missouriensis D. W. 



(Page 216.) 

 Fig. 2. Partially compressed spore case in sandstone. 



Sphenophyllum majus Brouu. 



(Page 180.) 

 Fig. 3. Verticils showing nervation of the leaves. U. S. Nat. Mas., 5680, 

 456 



