20 



GENERAL ORGANIZATION OF THE PROTOZOA 



colonies. A gregaloid colony arises by the adventitious union of 

 previously separated cells. Thus, many of the so-called "agglomera- 



FiG. 3 



V^Vr*"!;^ 







\\ 



N V ^ Si «^ ^ " 









^ ^' 



© c 



^ 



o 



3^5 c «L, c^ ' 



C) 



C o 





e 



C:j 



G> e> ti 



(9 



©■ 



© O 





■9 S, -i9 



3.^- 



3®<3^ 



o ® 



^■^'®. »»0® ®»®<^<=' o"^£>^ 



LVoglena aniericana, Calkins, a spheroid colony, consisting of monads embedded 

 in a gelatinous matrix. 



Fig. 4 



Codosiga oymosa Hav. Kent, an arboroiU colony of ChoanoHagellates. (After Kent.) 



tions" of spirochetes and trypanosonies are gregaloid colonies l>roue;ht 

 about by some adverse condition of the environment. A spheroid 



