PLASSOMYXINEAE 103 



time they appear under the microscope, and it assists the 

 eye, if the main features of each stationary part are traced 

 by means of a drawing eye-piece or other similar optical 

 instrument. 



Enumeration and Details of Vital Changes. Some vital 

 changes which I have already observed are shown in 

 Fig. 29 ; they are : 1, streaming of protoplasm with, 

 2, subdivision by budding ; 3, formation of a supporting 

 framework or of protective capsules ; 4, formation of 

 bird's-eye bodies ; 5, vacuolation with oscillation of granules : 

 6, formation of active flagellate or spirillar bodies. 



i. Streaming. The reality of the phenomenon being 

 proved by facts recorded below a few details may be 

 added. Fig. 29, a shows the aspect of a corpuscle just 

 before streaming begins ; its texture becomes more granular : 

 this is succeeded by a disappearance of granules from either 

 part of, as at b, or throughout a corpuscle, as at c, e, and /. 

 The fresh corpuscle often presents indications of being 

 segmented, and a regular segmentation is sometimes seen 

 in water cultures ; in one such I found the rotary motion 

 affected one only of the segments, Fig. 29, d. 



There are no separate granules to be seen in the moving 

 substance, which must be composed of extremely minute 

 elements, but large granules are sometimes seen on the 

 surface of the flowing part of a corpuscle, such granules I 

 have observed to be carried round one segment of bodies 

 such as that shown in Fig. 29, c. 



