PLATE V. 
Zamia floridana and Zamia pumila. 
Fig. 52. Mature spermatozoid while swimming free. (X 200 diam.) 
Fig. 53. Spermatozoid showing apex of spiral. 
Fig. 54. Fecundated egg cell immediately before nuclear fusion, the nucleus of the 
spermatozoid having separated from the ciliferous band and cytoplasm, lies free in 
the protoplasm at the apex of the egg cell ready to travel on alone and fuse with the 
egg nucleus. (X 25 diam.) : 
Fig. 55. Egg cell immediately after the fusion of the male and female nuclei, show- 
ing male nucleus in the upper portion of the oosphere, and the isolated ciliferous 
band of the spermatozoid which produced the fecundation lying free in the cytoplasm 
at the apex of the egg cell. A second spermatozoid trying to gain entrance is shown 
at apex of cell. (x 25 diam.) 
Fig. 56. Egg cell immediately after fusion of male and female nuclei as in fig. 55, 
showing longitudinal section of ciliferous spiral band and a portion of the cytoplasm 
of the spermatozoid. (x 25 diam.) | 
Fig. 57. Section through the apex of a fecundated egg cell showing the remains of 
the cytoplasm and ciliferous band of the spermatozoid surrounded by the cytoplasm 
of the egg cell. (xX 350 diam.) 
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