PROTOZOA 



39 



anterior end of the animal near the base of the flagellum, and 

 leading into a funnel-shaped tube, the gullet or oesophagus, as 



FIG. 20. Volvox globator. A, colony containing several daughter colonies ; B, col- 

 ony during spore formation, a, early stages in the formation of new colonies; 

 ovy, developing macrospores ; spy, developing microspores. (After Cohn and 

 Kirchner, from Parker and Haswell's Manual.) 



Fig. 2i. Gonium pectorale, a colony of Flagellata. (After Stein, from Calkins' 



Protozoa.) 



