^50 A ET. 4. A. Y A RUT) A : ON THE 



and pitted or reticulate. They are mostly irregular-shaped and 

 often stellate, with many remarkable intercellular sj^aces. Tlie 

 reticulate cells occur in Actinostemma raceniosum and Cucurbita 

 Pepo," those of the former being especially large and noticeable 

 (PL V. Fig. 63). 



The tangentially compressed cells of the fifth layer are also 

 thin-walled. They are gradually transferred over from the cells 

 of the fourth layer. 



The remnant of the nucellus coming under the fifth layer is 

 a strongly refractive tissue, which is made up of the epidermis of 

 the nucellus and several rows of compressed cells. Then follows 

 the remnant of the endodermis, under which are laid the cotyledons 

 (PI. V. Fig. 62-66). 



SUMMARY. 



1. The old stems of Luffa cylmdrica, L. aciUangulay 

 Momordicn Charaniia and Actinostemma Tacemosw)i are very 

 characteristic. They have a sharp keel along the angled portions. 

 Microscopical examination shows that the ridges of Luffa cylindrica 

 and L. acutangula consist only of outgrowths of the collenchyma, 

 while those of Momordica Gharant'ui and Actinostemma racemosum 

 are formed by newly developed secondary fibro-vascular bundles. 



2. Stomata on the stems of the Cucurbitacese may be 



1) J. F. FicKEL loe. cit. p. 757. and H. A. Lotar. loc. cil. p. 214. 



