― 66 一 



found in the cortical layer, each arising as a branch from one of the 

 lower cells of a cortical filament. The cell standinor next to the proxi- 

 mal one of an auxiliary eel レ branch acts as an auxiliary cell, while the 

 remaining ones in the same row serve as nourishing cells. After fertili- 

 zation has taken place trichogyne is cut oft from the carpogonium by 

 the formation of a septum, and cells of the carpoo'onial branch more 

 or less fuse together into one mass. From the carpop-onium thus 

 fused, 4 or 5 or perhaps more ooblastema-filaments arise in every 

 direction. They are pretty long- and slender and are neither branched 

 nor septate, as far as I have observed. The auxiliary cell acted upon 

 by an ooblastema-filament becomes a placental cell which soon gives 

 rise to a pdobular mass of carpospores. 



PL. XVI， Figs. 1-8. t\cr. 1 ： plant in dry state, I . — Fig. 2 : por- 

 tion of the cross-section of frond bearin;?* tetrasporano*ia, - . 一 Fig， 

 3 ： portion of the longitudinal section ot irond showinp- the formation of 

 cystocarps ； a, "， auxiliary cell-branches ； b、 fused mass of carpop^onial 

 cells ； c， cystocarp ； f、 longitudinal filament forminp- the inner layer o: 

 cortical filaments ； o、 o、 ooblastema-filaments ； t、 trichopyne ; s'^o . 一 

 1m 9". 4: carpoo-onial branch ； f、 longitudinal filament ； — rip". 5: 

 fusion of carpof^onial cells ； f、 filament ； t、 tricho!7vne ； ― ^―. — I つ g. 6 t 

 fused carpoi7onial cells and ooblastema filaments ； f、 nlament ； ^, 

 carpogonium ； 9— す i. 一 pio-. 7 ： formation of a cystocarp, c ； a, auxiliary 

 cell-branch -、 f、 filament ； - ^ 【丄 • 一 np-, Q ： cystocarp, c、 -" 



Dumontia Lamouroux 1813. 



*) うもん さう き 

 DUMONTIACEAE りう もん さう 科， 



體ハ圓 柱狀扁 圓若ク ハ^ 壓， 中 S 二 

 分 枝 ス. 枝ノ最 項 端 ナ ノレ 成長 部 ニノ 



シテ 側面 ヨリ 不規 PJJ ュ 

 ミ 中央-— 細 き 包 列 ヲ 存 



