72 Transactions of the 



to the multiple fission wliicli characterizes the great majority. 

 They appear to develope from the invisible sporule, and when full 

 grown to unite with a common form. 



The history thus worked out is comparatively simple. The 

 ordinary egg-shaped monad passes through a series of mutations of 

 form until it settles as a minute sphere. A white cruciform mark 

 suddenly appears, and is succeeded by others at angles to the first. 

 A rapid interior action ensues, and at length the whole body of 

 sarcode is divided into a large number of long bodies packed closely 

 together, which separate as flagellate monads. Besides these there 

 is a much smaller number of larger, rounder monads, of the same 

 form, distinguished by their granular aspect. These seize and 

 absorb the common form. The result is a still condition in the 

 form of a sphere. This eventually opens and a fluid is poured out, 

 or what appears like it ; no sporules can be seen. The result of 

 this, however, is the growth of minute specks, which we can only 

 suppose came from invisible germs ; and fr-om these, forms grow 

 like the parents, and the cycle is by them re-entered. 



{Experiments on Temperature, 4'C; to jolloxo in the next issue.) 



