Tab. CCLVII. 



Nephrodium (Lastrea) Ascensionis, Hook. — p. 124. 



Base of stipites, undeveloped frond, and fertile frond ; not. size. 

 Fig. 1. Pinnule; magnified. Fig. 2, Segment of a pin- 

 nule, ivith soius ; more highly magnified. 



