62 Dr. W. C. Williamson on 



very similar condition seen in the axial centre of Lepido- 

 dendron selaginoides, to apply to these cells the term 

 medullary. 



Primary Xylem and Medullary Parenchyma. 



Transverse. 



D -— P- 395, Fig. 30a, C.N. 1250. 



P- 395, Fig. 31b and c, C.N. 1250. 

 Longitudinal. 



D. — p. 395, Figs, 32 and 33b and c, C.N. 1266, 1268, 1270, 1276, 

 1278, 1284. 



Structure of Tracheids. 



D. — p. 395, Fig. 24, C.N. any of the above longitudinal sections. 



Secondary Xylem. 

 Transverse. 



D.—p. 395, Fig. 3od, C.N. 1250. 

 Longitudinal. 



D «— P- 395, Fig. 32d, d. C.N. 1250. 



Medullary Rays. 



Tangential. 



D.—p. 396, Fig. 33a, C.N. 1265, Fig. 33, C.N. 1268. 

 Radial. 



P- 396, Fig. 33 f, C.N. 1268. 



Cortex— Innermost Zone. 

 Transverse. 



D.—p. 396, Fig. 30g and 35g, C.N. 1250. 

 Longitudinal. 



D.—p. 397, Fig. 32g, C.N. 1270. 



Middle Zone. 



Transverse. 



D.—P- 397, Fig. 3 oh, C.N. 1250. Fig. 35I1". 



Longitudinal, 



D.—p. 397, Fig. 45, C.N. 1270. Fig. 32hh, C.N. 1278. 



Large vascular Bundles in inner and middle Cortex. 

 Transverse. 



F)- — P- 399, Figs. 30 and 35 m.m'. Figs. 37 to 44, C.N. 1240 to 1247- 

 Longitudinal. 



F>. — p. 399, Fig. 32m, C.N. 1284^. See also 1248 (barred). 



Origin of Bundles. 



D.—p. 401, Fig. 30m'", C.N. 1250. 



Anomalous Bundle with short Tracheids. 

 D. — p. 401, Fig. 36, C.N. 1260. 



