1038 
de Fraine. — On the Structure and 
secondary zone, but the sections are insufficient to trace the behaviour 
of the larger. The larger agrees, so far as the size and appearance are con- 
cerned, with the radially symmetrical leaf-traces which will be described 
later (p. 1047), while the smaller is probably a leaf-trace strand of the 
Text-fig. 8. Tracings showing the breaking up of the f meristeles ’ a and /3. The dotted areas 
indicate the primary wood ; only xylem is included in the tracing. Slightly under nat. size. The 
numbers refer to the numbers on the slides. M = main stele. All vascular tissues except the main 
stele, and the * meristeles ’ a and /3, are omitted. 
unilateral type. The evidence is not absolutely satisfactory, but it would 
appear to justify the conclusion that the hook-shaped projection seen 
in Section O is an outgoing foliar strand, which divides into smaller strands, 
