PLATE 3. — Female Gametophytes of Mazocarpon oedipterinum 



Fig. 1. Small isolated globule of tissue observed in chamber of gameto- 

 phyte at apex of spore; illustrated at lower magnification on plate 

 2, figure 3: From C. B. 136 (34). 



2. Small isolated globule of tissue (8-12 cells) in chamber of gameto- 

 phytic tissue at apex of megaspore: From 130 C2 (5). 



3. Gametophytic chamber (fig. 2) shown in relation to the rest of 

 the spore at lower magnification (same as for figs. 5, 6, and 7). 

 The chamber is at the spore apex; except in this area the mega- 

 spore cavity is filled by crystalline calcite devoid of tissue. Spore 

 coat appears thicker than normal because it is cut obliquely: From 

 130 C2 (5). 



4. Sections of two megaspores oriented at right angles to one another. 

 An archegonium, also shown on plate 4, figure 5 (A), surrounded 

 by very delicate gametophytic tissue, is seen (cut transversely) in 

 the spore at the top. The spore below shows shrunken endosporal 

 membrane: From C. B. 116 A 3b, (T6). 



5. 6, 7. Three successive longitudinal sections of a megaspore with 



delicate gametophytic tissue and apical archegonium. Figure 5 is 

 median and shows neck of archegonium protruding slightly into 

 apical vestibule. Figures 6 and 7 are at more tangential levels 

 respectively. A dark humic mass occupies the neck and top of the 

 venter: Sections at same magnification, from C. B. 116 A3 (T3) 

 and 116 A3b (T4) and (T5) respectively. 



8. Transverse section of apex of megaspore showing trilete rays and 

 section through top of archegonium: From C. B. 130 B. 



9. Archegonium (fig. 8) at higher magnification. A red humic 

 globule occurs in the center of archegonium which is filled with 

 more dispersed flocculent humic material. 



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