266 D. D. CUNNINGHAM. 
substance (Fig. 14). All the processes which have been just 
Fie. 14.—Ameebal mass breaking up into spores x 1000. 
described can sometimes be observed to occur in slide cultivations 
beneath cover glasses, and capable of continuous observation ; 
but under such circumstances they naturally never attain the 
magnitude and perfection exhibited under natural conditions 
ae the sporangia are developed on an exposed basis of large 
bulk. 
In such cases we may trace all stages of the formation of 
perfect sporangia from that in which we have mere irregular 
ageregations of closely adherent Amcebee (Fig. 15), which on being 
Fic, 15.—Irregular aggregate of Amcebe x 180. 
detached and introduced into a new nutritive medium become 
resolved into their constituent Amcbe (Fig. 16) by resumed 
Fic. 16.—Ameeba detached from rudimentary Sporangium x 1000, 
activity of the latter, to that in which we have perfectly developed 
sporangia, with a distinct investing membrane, and even, in cer- 
tain cases, an internal meshwork representing what may be re- 
garded as a rudimentary capillitium. The degree to which an 
actual fusion of the constituents of the sporangic mass takes 
