6 ART. 1. A. YASUDA : ON THE 



secondary meristem outside of the outer ring^^ of the vascular 

 bundles. 



Stoniata. The stomata on the stems generally lie in the 

 same plane with the adjoining epidermal cells, but they are 

 sometimes elevated with the epidermis above the surface of the 

 latter, appearing as if they were supported by a short thick hair. 

 GiLCurbila Pepo, Benincasa cerifera, Lagenaria vulgaris (PI. II. 

 Fio-. 34), Luffa cylindrica, and Trichosanthes cucwmeroides give 

 good examples of the elevated stomata. 



The average numbers of stomata on a square millimetre of 

 the stems of the Cucurbitacese in question are as follows : 

 Trichosanthes cucuiiieroides 23 



T. japonica 23 



T. multlloha 

 Gitrullus vulgaris 



Cucurbita Pepo 21 



Actinostemma racemosuvi 20 



Lagenaria vulgaris 18 



Cacuiiiis Melo 18 



Momordica charanlla 17 



Liùffa cylindrica 16 



L. acutangula 16 



Benincasa cerifera. 15 



Cucumis sativus 14 



iWelothria japonica 12 



Schizopepon hryoïiiœfolius var. japonicus 8 



Gymnostemma cissoides 7 



22 



9') 



1) The fibro-vascular bundles in tlie stems of the Cucurbitacece are arianged in two 

 circles, outer and inner, each of which contains five bundles. 



