104 



PROTISTS AND DISEASE 



2. Budding. From some of the bodies with streaming 

 protoplasm part of this can be seen to protrude as in 

 Fig. 29, /; and in the neighbourhood are smaller spheres 



FIG. 29. VARIOUS ACTIVE PHASES OF PLASSOMYXA CONTAGIOSA. a, 

 molluscum body unchanged save that the cortex is more definite 

 and the granules are larger than in the fresh state ; 6, a clear area 

 has formed and in it the protoplasm is circulating ; c, an internal 

 framework continuous with the cortex has formed and the whole of 

 the protoplasm is circulating ; d, a capsule has formed and within it 

 the protoplasm is subdivided into segments, in one of which only the 

 protoplasm is circulating ; e, a spherical capsule has formed, the 

 protoplasm is circulating and is in part protruded beyond the cortex ; 

 /, the whole protoplasm is circulating and a small protrusion is present, 

 and there are three separate subdivisions with circulating proto- 

 plasm, one vacuolated, another with a clear outer zone, and, to the 

 right, three subdivisions as they appear when they come to rest clear 

 and refracting ; g, a body in a surface view of which five buds are 

 seen in process of formation ; Ji, a body in which a nucleus-like 

 structure has formed ; i, a body with vacuolated protoplasm, the 

 intervening granules in Brownian movement ; j, body with violent 

 agitation of protoplasm ; k, flagellated body with agitated granules 

 at its expanded end. d, /, and g, X 800 ; the rest X 500. 



with streaming ; in some of the latter there is a bright 

 outer zone with no streaming ; some of the small streaming 

 spheres have a vacuole. 



