Explanation of Plates. 41 



EXPLANATION OF PLATES— PLATE I. 



A. Myriostoma coliforme, Dicks. 



B. Geaster limbatus, Fr. 



2. Before the outer peridium has opened. 



3. Outer peridium open and expanded ; inner peridium pedicel- 



late, constricted below. 



4. Diagrammatic section of the inner peridium exhibiting form 



and size of the columella and the shape and origin of the 

 threads of the capillitium. 



5. Threads and spores much magnified. 



C. Geaster saccatus, Fr. 



6. Before the outer peridium has opened. 



7. Outer peridium open and expanded, saccate ; inner peridium 



sessile. 



8. Diagrammatic section of the inner peridium, exhibiting the 



columella and capillitium. 



PLATE II. 



A. Mitremyces lutescens, Schw. 



1. Before the outer peridium has burst. 



2. Showing the sacculus suspended from the mouth. 



3. Section of the inner and outer peridium before the latter has 



opened. 



4. Inner peridium exhibiting the segments of the outer peridium 



about the base and the stellate mouth. 



5. One half of the inner peridium cut away showing the sus- 



pended sacculus. 



6. Diagrammatic section of the inner peridium exhibiting the 



origin, branching and interweaving of the threads. The 

 illustration applies also to Astraeus. 



7. Threads and spores much magnified. 



B. Astraeus hygrometricus, Pers. 



8. Before the outer peridium has opened. 



9. Outer peridium expanded, the segments reflexed, moist. 

 10. The segments unfolded, dry. 



n. Threads and spores much magnified. 

 N. B. The diagrammatic section would be similar to that of Mitre- 

 myces. 



