324 Shaw . — The Seedling Structure of A raucaria Bidwillii 
so forming an arc-shaped strand with the concavity inwards (Diagram III, 
Fig. 2) ; each of these strands subsequently splits into two bundles with their 
xylems obliquely facing each other (Diagram III, Fig. 3). Thus a ring of 
five pairs of bundles is formed, as in the previous case, with this difference : 
that each pair of bundles is derived from the same segment and the seg- 
ments themselves can be definitely traced back to groups of cotyledonary 
bundles. 
