io8 
F. Cavers. 
Fig. 4. Chlamydomonadace/E. A, B, Chlamydomonas (Chloromonas) 
variabilis Dang.: this species has no pyrenoid ; C shows transverse division. 
C, D, Chi. Ehrenbergii Gorosch. (longitudinal division shown in Dl. E, Agloe 
biciliata Pascher. F, G, H, Chlorogonium euchlorum Ehrb: in G the protoplast 
shows transverse division into two, in H the four daughter-cells formed by a 
further division have become arranged longitudinally within the mother-cell. 
J, K, Coccomonas orbicularis Stein : in K the wall of the resting cell has ruptured 
to set free the four daughter-cells. L, M, Pteromonas alula (Cohn) Seligo : 
