EXPLANATION OF FIGURES IN PLATES I AND II. 



Fig. I. Diagram of a young Sporogonium of Fossomhronia lotigiseta collected 

 November i, 1906, near close of the dry season. Found in a locality of 

 constant moisture. 



2. y^^Xwr^ ^\z.-s\\. oiFossombronia longiseta. Had grown all summer. Col- 

 lected January 6, drawn January 7. 



3. Living rhizoid of F. lotigiseta perforated by hyphae. X560. 



4. Hyphae passing from cells of thallus into rhizoid. X560. 



5. Abnormal rhizoid of F. longiseta containing hyphse. X s6o. 



6. Thin-walled vesicle of the fungus associated with^i^. longiseta , vf'xWnn 

 stem tissue of the host. X 560. 



7. Hypha complex within cells of the host, F. longiseta. X 560. 



8. Vesicle and hyphae apparently communicating with the exterior. X 

 560. 



9. (a) and {b). Formation of conidia by abstriction of hypha of the fun- 

 gus infecting F. longiseta. X S^o. 



ID. Development of sclerotia in cells of a leaf of F. longiseta. X 5^0. 



11. Perithecia-like structures developing from hyphae on the surface of 

 Aneura multijida major. 



12. Uninfected cells oi Aneura multijida major showing oil-bodies, o. b., and 

 chromatophores. X335' 



13. Infected cells of Aneura multijida major. Note the absence of oil-bodies 

 and small number of chromatophores. X 335- 



14. Three cells of Aneura multijida major showing knots of hyphae. Chlo- 

 rophyll and other cell contents wanting; cells, dead. X335- 



15. Infection of a young plant of Aneura tnultijida 7najor that has developed 

 from a gemma. X S^o. 



i6a. Branching rhizoids of Aneura multijida major. X 80. 

 i6b. Branching rhizoids of Lepidozia attenuata. X So. 



17. Longitudinal section of young sporogonium of Porella bolanderi near 

 close of the dry-season. X about 50. 



18. Portion of an infected leaf of Porella bolanderi showing chlamydospore 

 (c). X560. 



19. Developing sclerotia within leaf cells of Porella. X 560. 



20. Infection of tissue of Anthoceros pearsoni, showing sclerotium. X 560. 



21. Portion of plant of Fegatella co?tica showing receptacle. Collected 

 December 28, IQ06; drawn January 2, 1907. Ad. nat. 



22. Apical end of a young Fimbriaria plant. X 5^0. 



23. Young plant oi Fossombronia longiseta. X 5^0. 



All drawings except Fig. i, 16 and 23 were made with the aid of an Abb^ 

 camera lucida. 



(50) 



