ORIGIN OF THE METAZOA 



39 



(A). Dorsal View 



(B). Side View 



Fig. 10. Colonial flagellates. Volvox though a colonial animal has 

 protoplasmic connexions between the units of the colony. In this 

 respect it can be regarded as a syncytium. (From Borradaile and 



Potts, after Janet.) 



