736 THE STRUCTURE AND AFFINITIES OF DIPLOLABIS ROMERI (SOLMS). 



Fig. 45. Transverse section of petiole above fig. 44. The pinna-trace on the right-hand side is cut almost 

 longitudinally ; that on the left-hand side has already passed out through the cortex. The two traces pass 

 out together, but the section is not quite level. One part of each aphlebia pair has also passed out through 

 the cortex, pin. tr. = pinna-trace ; aph. £r.=aphlebia-trace. x.2*2. (Slide 797.) 



Fig. 46. Transverse section of petiole-trace showing relation of Flicheia esnontenais to Diplolabis romeri. 

 a = FlieJieiatxa.ee ; 6 = half of the normal Diplolabis trace; %. c. = inner cortex; o. c. = outer cortex. x 10. 

 (Slide 800.) 



Fig. 47. Transverse section of pinna-trace immediately after the pinna is free from the stem. x 10. 

 (Slide 809.) 



Fig. 48. Transverse section of pinna-trace dividing to give the secondary pinna-traces. Stage beyond 

 fig. 47. pin. ir. = pinna-trace ; p>. v p. 2 , p. 3 = secondary pinna-traces, x 10. (Slide 324.) 



Fig. 49. Transverse section of root-trace, prx. = protoxylem. x 36. (Slide 791.) 



Fig. 50. Part of outer zone of outer cortex in petiole showing sclerenchymatous tissue. This is from 

 lower end of petiole shown in PI. I. figs. 12 and 13. x 43. (Slide 811.) 



Fig. 51. Longitudinal section of petiole-trace showing reticulately thickened tracheides. x 30. (Slide 

 812.) 



