The structure & development of the mosses and ferns (Archegoniatae) . Fig. 208.—A, B, C, Sections made in three planes of the ripe antheridium of Marsilia vestita., X450 ;jr, vegetative prothallial cell; d, cover cell of the antheridium; D, E, spermatozoids, X900; v,the vesicle attached to the large posterior coils. is the small vegetative cell, in the basal cell of the antheridium,/*the lateral wall cells, and d the cover cell. Pilula7-ia approachesmuch nearer to the Polypodiacese in the structure of theantheridium (Fig. 209). The first funnel-shaped wall is muchmore frequently extended to th
The structure & development of the mosses and ferns (Archegoniatae) . Fig. 208.—A, B, C, Sections made in three planes of the ripe antheridium of Marsilia vestita., X450 ;jr, vegetative prothallial cell; d, cover cell of the antheridium; D, E, spermatozoids, X900; v,the vesicle attached to the large posterior coils. is the small vegetative cell, in the basal cell of the antheridium,/*the lateral wall cells, and d the cover cell. Pilula7-ia approachesmuch nearer to the Polypodiacese in the structure of theantheridium (Fig. 209). The first funnel-shaped wall is muchmore frequently extended to the basal wall, and the two groupsof sperm cells are much less distinct than in Marsilia. The spermatozoids of Marsilia are at once distinguishedby a great number of coils, sometimes thirteen or fourteen inM. vestita. The cilia are very numerous, but are attached only XII LEPTOSPORANGIAT^ HETEROSPOREAL 403
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Keywords: ., bookcentury1800, bookdecade1890, bookidstructuredev, bookyear1895
