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 Aneura multifida major. Its relation to the host is 
that of a parasite. 
4. Fungi were also found associated with Azthoceros pearsont 
and Porella bolanderz. In both cases the fungus is epiphytic, 
sending hausteria-like branches into the tissues of the host. 
5. Fertilization in Fegatella 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 pinguis 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 /imbrzarza cali- 
fornica, Targionia hypoyhylla, several species of /ticcza, Fos- 
sombronza, 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. 
9g. In Porella bolandert 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. pearsond and 
A. phymatodes are rendered resistant to drought by the presence 
of tubers. Similar structures, though less developed, are com- 
mon to Hossombronza 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. 
