Cassells European Ferns 
Vincent Brooks Day& Son Mi . 
I WOODSIA GLABELLA. 2. WOODSIA I LV E N S I S . 3. W 0 0 D S I A HYPERBOREA 
(natural size!) 
A PINNA, UTPER AND UNDER SURFACE B PINNA, UNDER SURFACE. C. PINNA,UPPER AND UNDER SURFACE 
(3'4 TIMES THEIR NATU R AL SIZES.) 
