172 



THE LIVING CYCADS 



Macrozamia: general description, 

 27; M. spiralis, 28; M. Deni- 

 soni, 28; M. Moorei, general 

 view, 31; poisoned specimen, 

 32; M. Hopei, 38, 69; M. 

 Miquelii, female cone, 148 



Marattia, 34 



Mexico, map, 12 



Microcycas: general description, 

 9; field view, 10 



Missing links, 155 



Naolinco, 23 



New Zealand, map, 26 



Ophioglossum pendulum, 34 

 Ostrich, 60 



Root: general description, 85; 

 field view, 84; root tubercles, 

 86; evolution of, 162 



Sago palm, i 

 Secretary bird, 60 



Seedling, 131, 155 . 



Selaginella, sporangia, g2, gj 



Snakes, 60 



Sperms: size, 113; structure, no 



Sporophylls, female, ijo 



Staghorn fern, jo 



Stangeria: general description, 42; 

 field view in Zululand, 43; pol- 

 len tubes, 107, 108; proembryo, 

 124, 125; evanescent segmenta- 

 tion, 126; wall formation in em- 

 bryo, 127 



Stem: general description, 67; 

 transverse section, 75; his- 

 tology, 7p, 80, 81; evolution of, 

 161 



Sydney, 27 



Tabby Tabby Island, 28 

 Train bulletin, 61 

 Tuxtepec, 20 



Zamia: general description, 7; 

 female plant, 8; young embryo, 

 128; female cone, 14Q 



