PLATE XXI. 



Figs. 1, 2. Asierocarpus Virginiensis, spec. uov. Pages 41 to 45. 



Fig. 1. Several compound sterile pinn® that wero ouce attached to a common rachis, showing the 

 diminishing depth ot'tho lobes from base to summit. 



Fig. la. Portion of a lower pinnule of Fig. 1, magnified to show the nervation. 



Fig. 16. Pinnule from the upper part of Fig. 1, magnified to show nervation. 



Fig. 2. Portion of a sterile piuua with large, broad pinnules. 

 Figs. 3, 4. Asierocarpus Virginiensis, var. obtusilobus. Page 45 to 46. 



Fig. 3. Summit of a sterile ultimate pinna magnified. 



Fig. 4. Upper part of a compound sterile pinna. 



