324 



LIFE-HISTORIES 



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Fig. 34b — Peat mobbC!) 1 p at of a gann toph\ te LiiUirgcd, showing malo 

 branches (a, a, a, a) unJ female branches (6, b). B, part of a leaf (5. 

 cymhifolium) , ^'l'^-, showing the net-work of green cells surrounding the 

 large ones which fill with water or air. C, vertical section through a 

 small piece of leaf (>S'. cuspidatum) showing the small and the largo 

 perforated cells, ^J-". D, cross-section through outer part of stem 

 (*S. cymhifoliuvi) highly magnified. E, male branch of 5. acuiifolium, 

 with a vegetative branch at the base, Y-. F< same, with many pseudo- 

 leaves removed to show the niale gamctangia {a/Uhcridia), Y. G, an 

 opened and empty antheridium, ^.n/!. /f^ five cells containing young 

 spermatozoids, ■^^■°-. ./, such a coll n<'arly ripe, '-';"-■ A', spermatozoid, 

 ^^^-. L, ripe "fruit" (siiorophyto) with remains (if the archegonium at 

 its hasp borne on a stalk e{nitiiHiing the axis of the pseudo-stem which 

 bears pseiido-lc;) vrs :it its biisi.-; iiKif^iiilicd. I S(^himper. ) 



