90 



r^i?^^3^ 



.■--".'>/.' J».W 



I'.-'";.'"-- V;!* :\ 









^>^:.;.;-"*f,: 



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6 



SALVINIA: 



Fig. 169 B. Cystodium sorbifoUum, part of 

 distal face (x 1000); d, sclerine stratifica- 

 tion; the small rounded excrescences of the 

 thin outermost (perinous ?) stratum are 

 cross-sections of the narrow white ridges 

 exhibited in the main figure (x 2000). 



Fig. 170. Salvinia cuciiUata, microspore; a, 

 lateral view ( x 250); b, exine stratification at 

 the transition between the two faces ( x 2000); 

 c, exine stratification, proximal face ( x 2000); 

 main figure: proximal face (x 1000). 



SCHIZAEA: see Fig. 143 E, F, p. 78. 



SELAGINELLA:— 



Megaspores: S. firnmla (Fig. 171), S. rupestris (Fig. 172), S. selaginoides 

 (PI. Ill, facing p. 94; Fig. 173). 



Microspores: S. apus (Fig. 174), S. ntrouiridis (Fig. 175), 5. biformis (Fig. 

 176), S. eggersii (Fig. 177), 5. flagellata (Fig. 178), S. kraussiana (Fig. 179), 

 S. radiata (Fig. 180), 5. selaginoides (Fig. 181), S. uncimda (Fig. 182). 



Fig. 171. Selaginella firmida. 



Fragment of section through 



megaspore membrane, x 



2000. 



