PLATE 17 

 Saprolegnia megasperma n. sp. 



Fig. 1-2. Typical sporangia. X 167. 



Fig. 3. Spores stained, showing cilia. X 900, 



Fig. 4. Sporangia, one proliferating internally. X 167. 



Fig. 5. Sporangia showing internal proliferation. X 167. 



Fig. 6. Gemmae which have become sporangia and emptied. X 167. 



Fig. 7. Typical forms and position of gemmae, one from which the spores failed to 



discharge completely. X 167. 

 Fig. 8. Oogonium with a single egg and an apiculus. X 247. 

 Fig. 9-11. Stages of sprouting gemmae. Each gemmae shows three pits from which sprouts 



are appearin : in two cases. X 247 

 Fig. 12. A s;emma breaking away from the hypha as in Dictyuchus. X 167. 

 Fig. 13. Oogonium with a single ripe egg, and two diclinous antheridia. X 500. 

 Fig. 14. Oogonium with a single egg and a diclinous antheridium showing an antheridial 



lube. X 500. 

 Fig. 15. Oogonium with androgynous antheridia. X 447. 

 Fig. 16. Habit sketch showing oogonia, antheridia and gemmae. X 108. 

 Fig. 17. Habit sketch showing a sporangium and several gemmae, one of which has 



developed an abortive antheridium. X 167. 



