Ii8 BOTANICAL GAZETTE [august 



82. Suzuki, B., Notiz iiber die Entstehung des Mittelstiickes von Selachiern. 

 Anat. Anz. 15:125-131. figs. 6. 1898. 



83. Swingle, W. T., Zur Kenntniss der Kern- und Zelltheilung bei den 

 Sphacelariaceen. Jahrb. Wiss. Bot. 30:296-350. pis. 15, 16. 1897. 



84. Thom, C., The process of fertilization in Aspidium and Adiantum. Trans. 

 Acad. Sci. St. Louis 9:285-314. pis. 36-38. 1899. 



85. Timberlake, H. G., Development and structure of the swarm spores of 

 Hydrodictyon. Trans. Wis. Acad. Sci. 13:486-522. pis. 2Q, 30. 1902. 



86. Van Hook, J. M., Notes on the division of the cell and nucleus in liver- 

 worts. Bot. Gaz. 30:394-399. pis. 2, 3. 1900. 



87. Webber, H. J., Peculiar structures occurring in the pollen tube of 

 Zamia. Box. Gaz. 23:453-459. pi. 40. 1897. 



88. , The development of the antherozoid of Zamia. Idem 24:16-22. 



figs. 5. 1897. 



89. , Notes on the fecundation of Zamia and the pollen tube apparatus. 



of Ginkgo. Idem 24:225-235. pi. 10. 1897. 



90. , Spermatogenesis and fecundation in Zamia. U.S. Dept. Agri., 



Bureau Plant Ind., Bull. No. 2:1-100. pis. 1-7. 1901. 



91. Williams, J. L., Studies in the Dictyotadeae. II. The cytology of the 

 gametophyte generation. Ann. Botany 18:183-204. pis. 12-14. 1904. 



92. Wilson, E. B., The cell in development and inheritance, p. 175- I 9°°- 



93. Wilson, M., Spermatogenesis in the Bryophyta. Ann. Botany 25:415- 



457. pis. 37, 3$. figs. 3. 1911. 



94. Wolfe, J. J., Cytological studies on Nemalion. Idem 18:607-630. pis. 

 40, 41. fig. 1. 1904. 



95. Woodburn, W. L., Spermatogenesis in certain Hepaticae. Idem 25:299- 

 313. pi. 25. 191 1. 



96. Yamanouchi, S., The life history of Polysiphonia violacea. Box. Gaz. 

 42:401-449. pis. ig-28. 1906. 



97- j Spermatogenesis, oogenesis, and fertilization in Ncphrodium. 



Idem 45:145-175. pis. 6-8. 1908. 



98. , Mitosis in Fucus. Idem 47:173-197. pis. 8-1 1. 1909. 



99. , The life history of Corallina. Unpublished. 



EXPLANATION OF PLATES VII AND VIII 



All figures were drawn at the level of the table with the aid of an Abbe 

 camera lucida under a Zeiss apochromatic objective 2 mm. N. A. 1 . 40* with 

 compensating ocular 18. They have been reduced one-third in reproduction, 

 and now show a magnification of 2533 diameters. 



PLATE VII 



Fig. 1. — Cell of penultimate generation rounding off. 



Fig. 2. — Deeply staining body with faint aster present in cytoplasm. 



Fig. 3. — Division of small body in cytoplasm. 



Fig. 4. — Two blepharoplasts formed by division of the original body. 



