PLATE XIII. 



Figs. 1,2. Acrostickides rhombifolius, spec. nov. Pages 29 to 32. 



Fig. 1. Represents the upper part of a compound sterile pinna where the pinna have become 

 simple pinnules. 



Fig. la. Pinnule of Fig. 1 magnified to show nervation. 



Fig. 2. Upper portion of a compound fertile pinna where the ultimate pinna} are simply lobed. 

 Figs. 3, 3 a, 3 ft. Acrostickides rliombifolius, var. rarinervis. Pages 32 to 33. 



Fig. 3. Portion of a normal, sterile, compound pinna. 



Fig. 3 a. Pinnules from the lower part of Fig. 3. 



Fig. 3 ft. Pinnules from the upper part of Fig. 3 magnified to show nervation. 



