Winton — Anatomy of the Fruit of Cocos nucifera. 275 



minute holes. The structure of the bundles is still further 

 obscured by the presence of fungus threads and spores. 



In structure the bundles differ from those of the mesocarp 

 fiber, the bast-fibers being replaced bj forms intermediate 

 between fibers and tracheids (fig. 9,f). The vascular elements 

 are chiefly spiral tracheae (sp.), and pitted tracheae (</), the lat- 

 ter being especially noticeable. 



1st 



Fig. 9. Longitudinal-radial section of cocoanut endocarp through the stone 

 cells and edge of bundle, qst, transversely elongated and isodiametric stone 

 cells; 1st, longitudinally elongated stone cells; f] thick- walled porous cells ; 

 g, pitted trachea ; sp, spiral trachea, x 300. 



4. Testa. 



Several microscopists have studied the testa, but, owing 

 doubtless to differences in the material, hardly two of them 

 agree as to the number of coats or the character of the 

 elements. The description which follows is based on the 

 examination of numerous specimens. 



(a) Outer testa. This coat consists of a ground tissue of 

 large, variously shaped cells, crossing one another in all direc- 

 tions, (fig. 8, 2] fig. 10), between which ramify the veins. 



