498 GENCHO FUJIMURA 



few, but being shrunken are changed into homogeneous bodies 

 of small size, the nucleoli alone making a prominent appearance 

 (vide the right-hand side of the figure). 



In figure 9 the syncytium layer is comparatively thin, 

 and there are comparatively few plastosomes to be found, being 

 scattered here and there, and mostly rod-shaped. The lipoid 

 granules are middle-sized and are not many in number, and a 

 few of them stay at the center of the vacuoles as if they were the 

 nuclei of the vacuoles. The vacuoles are pretty large, and they 

 arrange themselves close to the Langhans' cells. The nuclei 

 have distinct borders and masses of chromatin arrange them- 

 selves in rows, usually close to the nuclear membrane. 



In figure 10 the protoplasm is, as in a majority of cases, 

 generally dark-colored, though not homogeneous altogether and, 

 on a close examination, it is found that it contains a great number 

 of vacuoles, which gives the protoplasm more or less a foamy 

 appearance, though very indistinct as compared with other 

 foamy structures. The plastosomes are mostly rod-shaped and 

 are very distinctly stained. They appear generally in the upper 

 layer, though some are noticeable in the innermost layer. There 

 are no lipoid granules to be found and no nuclei of normal condi- 

 tions are to be met with, but, on the contrary, there are some 

 curious bodies, whose size is somewhat larger than the or- 

 dinary nuclei and which are irregular in shape. Some of them 

 are homogeneous and are quite dark-colored, while others being 

 non-homogeneous consist of different parts which are either 

 dark or light or somewhat clear, when stained! We come 

 across such structures very often in other parts of the syncytium 

 layer, but so far I have not been able to find out their original 

 nature. 



In figure 11 the protoplasm shows numberless vacuoles as its 

 constituents. The vacuoles are somewhat varied in their size, 

 and with the exception of some which are full and stained, a 

 greater portion of them, particularly those which are found on 

 the surface, are more or less loose and somewhat flattened in 

 shape. Between these vacuoles there are extremely large 

 quantities of plastosomes, which are mostly rod- or granular- 



