1906] YAMANOUCHI—POLYSIPHONIA VIOLACEA 445 
Fic. 91. Anaphase. 
Fic. 92. Late anaphase. : 
Fic. 93. Telophase; vacuole intruding between the daughter nuclei. 
FIG. 94. Mitotic figure to form second cell of the carpogonial branch; #c, 
pericentral cell. ; 
Fic. 95. Polar view of the same stage as shown in the previous figure; 20 chro- 
mosomes readily seen. : 
Fic. 96. Mitotic figure forming the third cell of the carpogonial branch. 
Fic. 97. Polar view of the same stage. : 
Fic. 98. Mitotic figure to form the fourth cell of the carpogonial branch. 
FIG. go. iew of the previous figure. 
F = fe preci a eb oe weit fourth cell of carpogonial branch, 
which develop the trichogyne and carpogonium; this mitosis gives rye ee 
nuclei as shown in fig. 101; being cut obliquely, the chromosomes, 20 in number, 
may be counted. 
ie oe two nuclei within the carpogonium or the fourth cell of the 
Catpogonial branch: pc, pericentral cell. 
PLATE XXIV. 
Development of the trichogyne. 
Fic. 102. Development of the trichogyne from the carpegosiae: : 
Fic. 103. A mature procarp in section, showing the situation of the carpo 
Sonial branch: c, pericentral cell; as, axial siphon. ; 
Fig. 104. Carpogonium with trichogyne at maturity; si ee ie = 
Size between the sister nuclei, for the carpogonium with its nucleus 
greatly. 
Fertilization. 
Fic. 105. Sperm attached at the tip of the trichogyne. : 
ing i i ; note the 
Fic. 106. Contacts of sperm, its nucleus passing into trichogyne; note 
individual chromosomes in the sperm nucleus. ie 
Fic. 107. Sperm cell emptied of contents; sperm nucleus about to pass 
trichogyne nucleus. ont as 
Fic. 108. Sperm nucleus having passed the trichogyne nucleus is a 
enter the carpogonium. re 
Fic. 109. Section of procarp showing the situation of the carpogonium 
time of fertilization. : eS 
Fic. 1o9a. The carpogonium of fig. 109 under higher — ei ae 
nucleus about to fuse with the female nucleus, which has moved up 
Carpogonium. s OTT 
Fic. 110. Mitotic figure in the formation of an auxiliary a sere ara Ti 
tral cell, which takes place parallel with the nuclear fone: ae or 
Fic. ea at Prophase of the 1 LGN eon Bee Maa g 20 cnr 
Fic. 112. Mitosis in a cortical cell of the procarp. 
