108 



EXORMOTHECA:— 



X 250 



X1000 



50 



100 !< 



P'ig. 211. Ex'ormotheca fimbriata; a, proximal, b, distal face (x 250). The 

 LO-patterns to the extreme right exhibit — at x-y — a part of one of the muroid 

 ridges shown in b, and also the "insuloiis" condition in the bottom of the 



lumina. 



Fig. 212. Fissidens adiantoides; surface and optical 

 section (x 1000), exine stratification (x 2000), and 



LO-patterns. 



FOSSOMBRONIA:— 



Fig. 213. A, Fossombronia angnlosa; spore (x 1 ()()()); a, part of "muri" at 

 high and, in b, at sb'ghtly lower adjustment of the microscope; c, spore, 

 lateral view ( 2r)0); the L()-])atlerns to the extreme left show the patterns 

 at the bottom of the liimina. 13, F. diunortieri; d, exine stratification (with 

 "murus", X 2000); e, spore (proximal face ?), x 250. 



