Tab. CXLI. 



A. Pteris (Ornithopteris) auuilina, L. — Var. a, glabra. — 



See vol. ii. p. 195, note. 

 Portion of a frond seen from above, nat. size ; with analyses of 

 the fructification showing the general presence of a double 

 involucre ; magnified. 



B. Pteris (Ornithopteris) AauiLiNA, L. — Var. 8, esculenta. — 



See vol. ii. p. 195, note. 

 Portion of a fertile frond, seen from beneath, nat. size; with 

 two sections, one exhibiting the presence of a double invo- 

 lucre, the other of a single involucre ; magnified. 



C. Pteris (Ornithopteris) scai.aris, Moritz. — See vol. ii. 



p. 200,* and Tab. CXXI. B. 

 Portion of a fertile frond, seen from beneath, nat. size ; with 

 analyses showing the presence of a double involucre. — 

 N.B. All the analyses on this Plate are prepared by W. 

 Wilson, Esq. 



* Since our remarks were printed on this Orthopteris-^vowp of Pteris in our 

 second volume, Professor Mettenius lias published an interesting memoir on the 

 same (with figures), entitled, " Ueber einige Schieier-versehenen Arten von 

 Pteris;" and Mr. T. Moore has expressed an opinion ('Index Filicum') that 

 the Pteris scalaris of Moritz is the genus Pcesia of St. Ililaire, in Voy. Distr. 

 Diamans, i. p. 281. I may here add, that Mr. Spruce has recently sent home 

 specimens of Pt. scalaris, n. 4666, in his collections from Tarapota, Eastern 

 Peru. 



