238 SOME NOVA SCX)T1AX AQUATIC FUNGI. MOORE. 



EXPLANATIONS OF FIGURES. 



(The numbers in brackets give the approximate linear magnification.) 

 Saprolegnia monoica Pringsh. Figs. 1-2. 



1. (100) Empty sporangia. 



2. (225) Oogonium. 



Saprolegnia diclina Humph., Fig. 3. 



3. (225) Oogonium with attached antheridia, The connection of these 



with their filaments of origin is readily severed. 

 Achlya americana Hump., Fag. 4. 



4. (225) Oogonium with antheridiial branch and atitheridia. 



Achlya deBaryana Humph. = A. polyandra doBary, Figs. 5-8. 



5. (225) Empty .sporangium, young culture. 



6. (100) Two filaments with oogonia and antheridial branch. The 



production of an oogonium at the base of an antheridial 

 branch as here figured is very rare. (6) A ripe eceiitric 

 oospore. 



7. (225) Oogonium with young oospores and antheridia. 



8. (225) Oogonium with much coiled antheridial branch. 



Achlya polyandra Hlldeb., Fag. 9. 



9. (225) Typical oogonium with antheridial branches and antheridia. 



The antheridial branches in this case take their origin in 

 part from the oogonlal branch and in part from other 

 filaments. 



Achlya apwnlata deBary, Figs. 10-13. 



10. (50) Empty sporangia from vigorous culture. 



11. (225) Oogonium with antheridial branch and antheridia. No 



apiculus on oogonium. 



(225) Typical oogonium antheridia omitted. 

 (225) A rare intercalary oogonium. 



Achlya raccmosa Hildeb., Fig. 14. 



14. (225) Oogonium with antheridia. 



Achlya raccmosa var. stcllir/era Cornu., Fig. 15. 



15. (225) Oogonium with antheridia. 



Achlya acadiensis sp. nov., Figs. 16-19. 



16. (100) Sporangium with encysted zoospores. 



17. (225) An intercalary oogonium. 



18. (225) Terminal oogonium. 



19. (225) A portion of the wall of an cogonium. 



Aphanomyces stellatus deBary, Fig. 20. 



20. (225) Oogonium with oospore. 



Leptomitus lacteus Agardh. Figs. 21 and 22. 



21. (225) A portion of a hypha shewing method of branching and 



cellulin granules. 



22. (225) A terminal sporangium with zoospores encysted within it. 



Kapromyces sp. Figs. 23 and 24. 



23. (100) Hypha3 shewing method of branching and formation of 



sporangia. 



24. (225) Empty sporangium with three r icy ted /oospores. 



