CAMPBELL 



1. Two spores of O. moluccanum, showing range in size. X 500. 



2. Two-celled gametophyte of O. moluccanum. 



3. A three-celled stage, sp, ruptured spore membrane. 



4. A four-celled stage, seen from above. 



5. Two transverse optical sections of a four-celled gametophyte. 



6. Three-celled gametophyte of O. intermedium Hk. 



7-9. Young gametophytes of O. pendulum L., showing mycorrhi/a! 

 infection, m, mycorrhizal filaments. 



10. Adult gametophyte of O. moluccanum. X 10. /, basal tuber; 

 J , anthcridia. 

 11-14. Gametophytes of O. pendulum. X 3. b, adventitious buds; 

 sp, young sporophytc. 

 15. Upper part of ripe antheridium of O. pendulum. X 275. 

 o, opercular cell. 

 16-20. Development of the spermatozoid in O. moluccanum. X 950. 

 bt, blepharoplasts. 



