COMPARATIVE AXATOMY OF THE CUCURBITACEJi:. 43 



G. sativus 27 



Benincasa cerifera 20 



Trichosanthes multiloba 16 



Lagenaria vulgaris 14 



3'fomordica Charantia 12 



Actinostemma racemosum 10 



Gymnodemma cissoides 10 



Tricliosanthes cucumeroidcs 9 



T, japonica 8 



Melothria japonica 8 



Sohizopepou hryoniœfoUus, var. japoaicus 5 



Trichoiiies. When young, the fruit bears several kinds of 

 trichomas un its surface, hut \Yhen they become old ahnost all of 

 the trichomes have become detached from their bases, which then 

 remain as traces of the once existing trichomes. We may distin- 

 guish four kinds of trichomes on the surface of the fruit : sharp- 

 pointed conical hairs, blunt-ended conical hairs, short-stalked gland- 

 ular hairs, and long-stalked glandular hairs, the details of which 

 are quite the same as those of the stem. 



Cnft'rh'. The cuticle on the fruit-snrface may be smooth 

 or striated. In Luffa ci/lindrica, L. acutangula, Actinostemma 

 racemosum, Schizopepon hryoniœfolius, var. japonicas, Cucurbita. 

 Pepo, Momordica Charccntia and CilruUas vulgaris it is striated, 

 that of Luffa cylindrica and L. acuOuigula being the most marked, 

 the striations running ont radially from the bases of the trichomes 

 or from the stomata. In the remaining species it is smooth. 



Wax. The fruit, when matured, has a greater or less deposit 

 of \Yax on its suriace. This wax covering is best developed on 



