46 HUMPHREY 



four layers of ventral cells and to both sorts of rhizoids. Its 

 relation to the host is apparently symbiotic. 



3. A fungus, evidently epiphytic in habit, was found associ- 

 ated with Anctira 'nmltijida major. Its relation to the host is 

 that of a parasite. 



4. Fungi were also found associated with Anthoceros fearsoni 

 and Porella bolanderi. In both cases the fungus is epiphytic, 

 sending hausteria-like branches into the tissues of the host. 



5. Fertilization in Fcgatella conica in California occurs in 

 early spring. At the close of the dry season the spores are in 

 the tetrad stage. With the commencement of the rainy season, 

 the growth of the female receptacle is resumed and the spores 

 mature early in January. 



6. When hygrophilous forms such as Aneura -pingids or 

 Fegatella conica are transferred to a dry habitat and allowed 

 to become desiccated they are unable to recover. 



7. All of our xerophilous forms such as Fimbriaria cali- 

 Jbrntca, Targionia hyfoyhylla^ several species of Riccia, Fos- 



sombroma, and others resume growth promptly after months of 

 extreme drought. When artificially desiccated over glacial 

 phosphoric acid until further loss of weight is imperceptible, on 

 being moistened they revive quite as promptly as when nor- 

 mally air-dried. 



8. Artificial drying does not impair germination of spores of 

 xerophilous forms. 



9. In Porella bolanderi material examined at the close of 

 the dry season exhibits holdover antheridia and archegonia and 

 well-advanced sporogonia. Other xerophilous forms of peren- 

 nial habit show sex organs in various stages of development. 



10. Fossombronia growing in a habitat of constant moisture 

 matured spores in March and December to February. 



11. Mucilage secreting structures are common to many forms 

 and especially to our species of Anthoceros. A. fearsoni and 

 A. fhymaiodcs are rendered resistant to drought by the presence 

 of tubers. Similar structures, though less developed, are com- 

 mon to Fossombronia longiseta in dry regions. 



12. Spores of xerophilous forms are known to retain their 

 vitality at least two years and probably longer. In nature they 

 pass through a resting period of several weeks. 



