io Bower.—Studies in the Phytogeny of the Filicales. VII. 
Fig. ii. a, b. Longitudinal sections following the marginal series of cells of the pinna of Schizaea 
digitata , and the sporangia which arise there. In a they are cut vertically, in b horizontally. 
C X 85.) 
Fig. 12. Longitudinal section through the apex of a pinna of Mohria caffrorum, showing the 
apparently superficial position of the sporangium, which is actually marginal in origin. This 
appearance is due to the active growth of the indusium from its base, forming a false margin. ( x 75.) 
Prantl; 1 and he delineates it (Fig. 143, C.D.), and remarks that ‘this is an 
indication how one may imagine that a dorsal insertion of the sorus may 
originate from one terminal on the vein 
2 1. c., p. 44. 
