Tab. CCLXXI. 



Nephrodium (Lastrea) acutum, Hook. — p. 147. 



Base of a stipes, and (Fig. 3) a portion of the frond ; nat. size. 

 Fig. 1. Involucre ; much magnified. Fig. 2. Fertile seg- 

 ment of a pinna ; less magnified. 



