Plate II. 



A/nr!a macroptera (Wi'vii.) 



l'i^'. I. A seH-Dud-ycar frond in uatural si/e, Avithfullv juatmvd spitrophylls ; 

 tliH upper ])art vï tlie Idade eut off. 



l"'i|LC. 2. An iip])in- portion ot" tlir l>lale to show th(> tiuc corrnj^-ation of tJie 

 inari;'ins. Nat. size. 



l*'i}4;s. :-)-"). Cross sections of the ni.idril>s of various s])0(*ini(Mis. x H. In tlie 

 section shown as Fi,i;\ o tht^ nie(hilla :ind tlie periniednllary 

 tissni^ have not been so distinct as in the otlu^rs under the low 

 power lense ; in the medulla the callus formation Avas es])ecially 

 rich. TJie nu'dril) shown as 'Fit!;. ~> is abnormal in sha[)(' as well 

 as in the distribution of the sj)annini;' cortices (»n both marii;ins. 

 The slut])e of the cro.ss section recalls the fiij;m'e illustrated by 

 Setchell for Alaria valida. 



