PLATE 19 

 Saprolegnia astkrophora 



Fig. I. Emptied sporangia one on left containing young oogonium. X 278. 



Fig. 2. Irregular hypha with oogonia. X 1S8. 



Fig. 3 Cluster of oogonia. X 188. 



Fig. 4. Oogonia and sporangia. X 188. 



Fig. 5. Young oogonia. X 188. 



Fig. 6. Spores sprouting in sporangium. X 188. 



Fig. 7. Three gemmae. X 188. 



Fig. 8. Oogonium with ripe egg. X 810. 



Fig. 9. Proliferation through an old sporangium forming an oogonium. X ii.S- 



Fig. 10. Zigzag course of hypha caused by death of tips. X Ii5- 



Fig. II. Oogonium with antheridia. X 503. 



Fig. 12. Intercalary oogonium. X 503- 



Fig. 13. Chain of intercalary oogonia. X 503- 



Fig. 14. Oogonia with an antheridium and numerous aborted antheridial branches. 



