Dec, i(u.i.j ,; fsllIKAWA.— TIIE J^UMliKl: 01' ( 'IFROMOSOMES. 4|7 



Osinunda cinnaip.onea 22 



Yamanouciii ; n(jt. Gaz. lO. lOK). 

 Alsophila excelsa ±60 



Gkegoky ; Ann. Bot. IS. 1904. 



Ophioglossum reticulatum ±120-100 



liuRMNGAMi: ; IJot. Gaz. 44-, 1907. 

 Salvinia natans 8 16 



Yasux ; Bot. Mag. Tokyo. 24. 1910. & 

 Arm. Bot. 25. 1911. 



M .5 4 8 



Akn'OLDi ; Flora. 100. 1909. 



Marsilia Drummondii 32 



M. vestita 16 32 



M. Nardu 32 



M. elata 16 32 



M. quadrifoliata 16 



M. hirsuta 16 



Strasburger ; Flora. 97. 1907. 

 Equisetum aryense ±115 



Beer ; Ann. Bot. 27. 1913. 

 E. limosum 45-50 



BoNiCKE ; Ber. Dcut. Bot. Ges. 29. 1911. 

 Psilotum triquetrum 48 96 



Rosen; Cohn's Beitr. Biol. 7. 1896. 



GYMNOSPERMAE. 

 Cycas revoluta. (P. 419. Fig. i)* 24 



ISHIKAWA ; 1916. 



Dioon edule 12 



Chamberlain ; Bot. Gaz. 47. 1909. 

 Ceratozamia mexicana 8 



GuiGNARD ; Journ, Bot. 3. 1S89. 



Overton ; Ann. Bot. 7. 1893. 



8 16 



12 



Smith ; Bot. Gaz. 43. 1907. 



Zamia floridana 12 



Smith ; Bot. Gaz. 43. 1907. 



* Fig. Irt and lb are drawn from two succeeding sections obliquely cut tlirou;^li 

 a nuclear plate in tiie free nuclear division in tlie festilized egg cell. 



