110 JOURNAL OF THE [Ociober, 



The spindle cells extend within from the pal'sade cells at a 

 (Figs. 6, 7), through more than one-half of the entire radius of 

 the stone, for a short distance beyo id the line b. Succeeding this 

 another form of cells will be met. They are very irregular in 

 outline, have the cell walls more thickened than any of the others, 

 and are supplied with an immense number of pores extending in 

 every direction. Although very variable, the majority of them 

 are sub-globular, and hence they may be termed the globular cells. 

 They are most prominent about the position c of Fig 7. At last, 

 at d, the structure filling the cleft is reached — a mass of brown, 

 thick-walled, but soft polygonal cells. 



Fig 8 is an enlarged view of a small portion of the transverse 

 section, corresponding with a of Fig. 6. On the right are seen 

 the sections of cells of the seed coats. Next these are the palisade 

 cells, with thickened, smooth, entire walls. Then come the spindle 

 cells, at first having but few pores, but with pores increasing in 

 number as the cells are viewed in succession, until the position 

 b, Fig. 6, is reached, where they are very numerous. In a thin 

 portion of the section, as represented in Fig 8, the middle lamella 

 between two adjoining cell walls is plainly seen, showing that 

 pores from adjoining cells meet at, but never pass through, the 

 lamella, which remains as a thin membrane entirely closing each 

 cell. Occasionally an oblique septum will be found in a spindle 

 cell, as in two instances in Fig. 8, like a little disc on a slender 

 shaft. This appearance is caused by the section of a thickened 

 septum, with a pore on either side next the cell wall. Fig. 9 is 

 an enlarged view of a few cells, also from the transverse section, 

 taken near the position b. The walls are more thickened, and the 

 pores are far more numerous. Fig. 10 gives an enlarged view of 

 two of the globular cells at the position of c, Fig. 7. They are 

 not as globular as usual, but they show the structure well. The 

 surrounding walls are excessively thickened, and the pores are 

 very numerous. This is the most dense portion of the entire 

 internal structure. The appearance of the wall between the two 

 cells, and of the outer wall of the lower cell, is of quite frequent 

 occurrence. The middle lamella is stouter through this dense 

 portion of the endosperm than at other positions, and takes the 

 stain deeply. And the pores sometimes, as in this case, are so 

 frequent and so close together, that the section of the adjoining 



