164 



MR. H. HAMSHAW THOMAS AND MISS 



ON 



figs. 7 & 8). It is surrounded by from four to six subsidiary 



cells, and is strong 



cuticularised . 



Simple liairs and hair-scars occur in E. Ghellinckii 



In U. caffer crystals of calcium 



Fig. 6 





Encep7ialai-tos Lehmanni. — Section of the lower cuticle, showing a stoma in median section. 



Note the presence of intercalated cells between the guard-cells and subsidiary cells, 

 and the heavy cuticularisation. x 450. 



Fiff. 7. 



Fig. 8 



E, LehmannL — Lower cuticle (after maceration) in 

 surface view, showing a stoma-opcning (s) sur- 

 rounded by six subsidiary cells (^, polar sub- 

 sidiary cells ; ?, lateral subsidiary cells), x 450, 



E. villosus, — Lower cuticle in surface view ; the 



stoma- opening is surrounded by five subsidiary 

 cells, one of the polar cells being divided. X 450. 

 This cuticle was not removed by maceration, so 

 that the thickening of the guard-cells and the 

 lining of the outer air-space show through in 



the surface view, 



giving 



a 



much thickened 



appearance to the stoma-opening. 



oxalate, such as figured by Nestler (1895, Taf . 11. figs. 6-8), were not observed ; very 

 little material of this species was, however, available. 



The cutin layer is of a considerable thickness in the case of both upper and lower 

 epidermises (PI. 18. fig. 10 ; text-fig. 6). 



