282 Muscologia Itineris Assamici. 



9. Inner membrane and peristome. 



10. Tooth of the outer peristome. 



11. Portion of the inner peristome and inner membrane. 



12. Sporula. 



Plate XVII. — Pleuropus densus. 



1. Portion of the plant. 



2. Cauline leaf. 



3. Male flower. 



4. Same leaves removed. 



5. Anther. 



6. Capsule with its operculum. 



7. Operculum removed. 



8. Calyptra. 



9. Capsule. 



10. Portion of capsule, outer and inner peristomes and of 



membrane. 



11. Tooth of outer peristome. 



12. Portion of inner peristome and membrane. 



13. Sporula. 



Plate XVIII. — Pleuropus fenestratus. 

 .1. Portion of a plant. 



2. Cauline leaf. 

 2«.Perich9etial ditto. 



3. Capsule. 



4. Operculum. 



5. Calyptra and operculum. 



6. Inner membrane and peristome. 



7. Tooth of the outer peristome. 



8. Portion of inner peristome and membrane. 



Plate XX. — Pleuropus pterogonioides. 



1. Portion of the plant. 



2. Cauline leaf. 



3. Perichsetial ditto. 



4. Capsule. 



5. Portion of capsule and outer and inner peristomes. 



All more or less magnified. 



