devoid of chlorophyll occur. The intercellular spaces are in 

 many cases formed by the separation of two neighbouring 

 membranes and not normally either between three cells or 

 between the lobes of two as may be conjectured to be the 

 case in Pir. grandifiora and in minor. In regard to the 



Fig. 3. Pirola secunda. 



1, Leaf in transverse section. 2, Lower mesophyll with the characteristic intercellular 



spaces. 3, The epidermis of the lower, 4, of the upper surface. X about 430. 



(Denmark : Hornbæk Plantage). (H. E. P.) 



Structure of the leaves the two northern specimens agree exactly 

 with those from Denmark. 



The structure of the stem presents no feature of import- 

 ance it corresponds essentially with that of the two mentioned 

 above. 



No examination has been made of the roots. 



