PLATE 21 



ISOACHLYA TORULOIUES 



Fig. I. Gemmae. X 167. 



Fig. 2. Oogonia with and without antheridia. X 167. 



Fig. 3. Oogonia and gemmae. X 167. 



Fig. 4. Oogonia. X 167. 



Fig. 5. Proliferation through old sporangia. X 250. 



Fig. 6. Oogonia with ripe eggs. X 417. 



Fig. 7. Oogonia in chain w^ith an old sporangium on tip of chain. X 167 



Fig. 8. Oogonium. X 250. 



Fig. 9. Gemmae, sporangia, and an oogonium on same hypha. X 167. 



Fig. 10. Oogonia in a chain. X 250. 



Fig. II. A group of sporangia of Acli!ya-\ike origin, one showing internal proliferation. 



Fig. 12. A spherical oogonium and a cylindrical oogonium in old sporangium on same 



hypha. X 250. 

 Fig. 13. Oogonia, one with a antheridium. X 417. 



