68 JOURNAL, BOMB A Y NA TDRAL HISTORY SOCIETY, Vol. XV 11 1. 



phyll of the leaves is shining faintly through the covering of wax. In 

 other plants, v. g. in Cocculus leceba, a thick mantle of cork surrounds 

 stem and branches, whilst Panicum turgidam, Spovobolus spicatus and 

 other species show strongly cuticularized epidermis which diminishes 

 transpiration from the outer surface. The same effect is obtained in 

 some plants by the deposition of a mucilaginous substance in the 

 epidermal cells, v. g. in Zizyphus spina Christi, Moringa aptera t and 

 Cassia obavata, 



