I04 Cincinnati Society of Natural History. 



cells, in which this plant stores up its starch. In the longitu- 

 dinal section (Fig. 3), through the bundle, the starch cells 

 (Fig. 3) are seen on both sides, and along the whole length of 

 the bundle. Thus, here we see that starch is stored up in 

 specialized cells — cells with a definite position in regard to 

 some other fixed organ. 



"Ux. 



EXPLANATION OF THE FIGURES. 



Fig. I. — A portion of a diaphragm very highly magnified, 

 showing the polygonal cells, and at B the inter-cellular spaces. 

 A. Is a cell containing raphides. 



Fig. II. — Cross section of a fibro-vascular bundle, sur- 

 rounded by the parenchymous tissue. A. Specialized starch 

 cells, containing a few grains. 



Fig. III. — Longitudinal section through a fibro-vascular 

 bundle. A. Specialized starch cells each side of the bundle. 

 The bundle itself is purpo.sely omitted. 



Fig. I\\ — Longitudinal section, showing attachment of 

 diaphragm to the other parenchj-mous tissue. The cell 

 marked A contained chlorophyll grains. 



