479 
the young plants in Oedogonium. 
androspores on germinating would naturally have a still more 
reduced vegetative portion. In fact, if we suppose the in- 
dividual shown in Fig. 26 d to have been situated on an 
Fig. 27. a, e, /, and h> Oedogonium cardiacum , Wittr. a. Young plant with 
basal disc, which has formed successive rings, c 1} c 2} and c 3 without corresponding 
formation of transverse walls ; v = first cap, which has been cast off. e,f. Abnormal 
germination of zoospores, h. Floating plant, in intimate connexion with an air- 
bubble a , which is joined to the plant at the point where a ring of brown matter, 
r, surrounds the cell. b. Oedogonium Vaucherii , Braun, irregular thickenings in 
cells of filaments, cultivated in a 2% solution of cane-sugar, c, g, Oedogonium 
capillar e , Kiitz. c. Germination of a zoospore within a young unicellular plant. 
g. Abnormal germination of zoospores, d. Oedogonium stagnale, Kiitz, abnormal 
germination under almost normal conditions. ( x 420.) 
