400 



BENNETTITALES 



[CH. 



fleshy region immediately internal to the folded (or radial) layer 

 and an inner fibrous region next the nucellus, which is one-layer 

 broad between the wings but opposite the wings it extends 

 radially outwards across the fleshy tissue to the radial layer 



Fig. 526. Cycadeoidea (Bennettites) Morierei. Longitudinal section of a seed and 

 interseminal scales. (From a photograph supplied by Prof. Lignier.) 



(figs. 524, C; 525; 527): in the winged portion of the seed this 

 tissue forms the inner fibrous portion of the wings but in the 

 lower part of the seed below the wings it forms a single layer of 

 uniform breadth finally spreading out as a basal cup in the chalazal 

 region where it is pierced by the vascular strand. The fleshy 

 portion of the testa forms one layer in the proximal part of the 



