EXPLANATION OF THE PLATES. 



Ociicra of Filicc. 



TAB IX. 



POL YPODIUM. Plant; piece of the fron* (t) ; n magnified sporangium \rith Its stalk, 

 and another bursting and discharging spores, of P. vulgare, L. 



BTKUTHIOPTERI9. Pinna of the sterile froud (i) c f S. Germanlca, WilM.; portion of e 

 fertile frond (2); apiece of one pinna cut ofifto^hcwtho manner in which it is rolled 

 np (8); and a portion of the last, magnified, with on^ side unrolled (4) ; towards the 

 base the sporangia all removed, to show how tho fruit-dots are bo.ne each on tlw 

 middle of a vein. 



ALLO8ORUS. Sterile and fertile plants of A. gracilis, Prv&.; md ^ portion of the fortfU 

 frond (1) enlarged, with a piece of the marginal lndns<um turned ba^k <x> display 

 the fruit; the sporangia are all removed from the fruit-bearing Upb of th two fork." 

 of the lower vein. 



TAB. X. 



PTERIS. A pinnule of P. aqulllna, Z., var. caudata; and a piece of on <* the lob<* 



enlarged (2), the marginal indnsinm rolled back on one side, displnyii.g thr frilt, 



the sporangia all removed from the lower part to show the receptacle that NJ:\ 



thorn, viz. a cross line connecting the tips of the veins. 

 ADIANTUM. Piece of the frond of A. pedatum. L. (1) ; a pinnule somewhat enlarci-d (3^ 



and a piece of one (8) more enlarged, with the Indusium of one fruit-dot turned b:uj* 



to show the attachment of the fruit. 



CITEILANTHE8. Small plant of C. vestita(l); and a fruit-bearing pinnule. enlarged ( 2) 

 WOODWARDIA. Portion of the sterile (1) AIKI of the fertile frond (2^ r>f W. anirust!- 



folia; a piece of the latter enlarged (8); piece of the'frond of W. Virginlca (4j ; and 



part of a fruiting lobe (5), enlarged. 



TAB. XI. 



CAMPTO3ORU8. Plant of (1 rhizophyllus, IAnk.; and a portion of a frond, with fruit 



dots, enlarged (1). 

 tCOTX)PKM>i:i I'M. Tip of a fertile frond of S. offlclnarum; and (2) a piece enlarged, 



with two fruit-dots. 

 &.SPLKN IUM. A i-inna of A thelypteroides, Mh-hx. (1) ; and part of 11 lube (2) in fruit, 



enlarged. 



