PLATE XXIII. 



Pigs. 1-4 a. Asterocarpus Yirgiiiienais, spec. nov. Pages 41 to 45. 



Fig. 1. Several fertile pinnae that were once attached to a common rachis, seen from the upper 



surface with the sori showing through the leaf substance of the pinnules. 

 Fig. 2. Portion of the lower part of a compound fertile pinna, seen as in Fi^. 1. 

 Fig. 3. Portion of a compound sterile pinna showing unusually large pinnules with undulate 



margins. 

 Fig. 4. Portion of a fertile pinna seen from the under side and showing the true form of the sori. 

 Fig. 4 a. Portion of the pinnule of Fig. 4, magnified to show the form of the sori. 



