3^6 • BOTANICAL GAZETTE 



[may 



Vaizey, J. R,, AI 

 4:371-378. 1890. 



Annals of Botany 



72, Vines, S. H., On alternation of generations in the thalloph>tes. Journal 

 Botany 17:321. 1879. 



J 



tetraspo 

 160. i)ls 



74- , II, The cytology of tl 



18:183-204. ph. 12-14, 1904 



75. WlXKXER. Hans. JJehf-r P;irt 



Annals of Botany 



Mey. (Vorlaufige Mittheilung). Ber. Deutsch. Bot. Gesells. 22:573-580. 



1904. 



76. , Ueber Parthenogenesis bei Wikstroemia indica, Ann. Jard 



Annals of Botany 18: 



Buitenzorg 5:208-276. ph. 20-2 j, 1906. 



77. Wolfe, J. J., Cytological 

 607-630. ph. 40, 41. 1904. 



78. WoRONiN, Helexe Wesselowska, Apogamie und Aposporie bei einigen 



Farnen (Vorlaufige Mitteilung). Ben Deutsch. Bot. Gesells. 25:85, 86. 

 1907. 



79- - , Apogamie und Aposporie bei einigen Farnen. Flora 98:101-162. 



figs, 72. 1907. 



80. Yamanouchi, S., The life-history of Polysiphonia. Box. Gazette 42: 



401-449- figs^ 3' Pls^ 19-28. 1906. 



^^- > Sporogenesis in Xephrodium. Box. Gazette 45:1-30. pls> ^'4- 



1908. 



^^- > Spermatogenesis, oogenesis, and fertilization in Nephrodiura. Box. 



Gazette 45:145-175- pl^- 6-8. 1908. 



EXPLANATION OF PLATES IX AND 



figu 



apochromatic obj. i.stnm n. A. 1.30, combined with compensating 



except figs, a 10 jj 72, rr tA. 20 ^r oRn. r1rai._-n ^TJ'^i^^ /-nmnpni^qfin 



mpensating ocular 4; 



/-S-. ^o, ^u, ana text cuts drawn under combination of dry obj. 4""" 



ocular 4, The plates and text cuts are reduced to one-half the original size. 



Figs, i— ^ arf* in fK*^ f^^f 



Figs. 1-3 are in the text. 



PLATE IX 



Fig. 4.~Nucleus of vegetative cell of an apogamous prothallium; spirem 

 ned; two nuclmli nrAc^^nf 



Fig. S-— Late prophase; long slender chromosomes present, previous 

 their arrangement in an equatorial plate. 



to 



Fig. 6. 



Fig. 7.— Late a 



■Metaphase; t^vo daughter halves of each chromosome just separated 



T .n f P rir\n r-Jl^ .r,,, -. _Jl. m _ 1_ 



pole: 



no. a.— i^olar view of late anaphase; 64 chromosomes present in a group. 



