Williams: Mosses from west coast of South America 403 



explanation of plates 21-2S 



Plate 21 

 Campylopiis pentvianus. i. Plant about natural size. 2. Stem-leaf, X 18. 3. 

 Hyaline point of leaf, X 103. 4. Basal cells on one side of costa, X 124. 5. Me- 

 dian cells of leaf, X 124. 6. Half a cross-section near the middle of leaf, X 124. 



Aslomitm chilense. 7. Plant about natural size. 8. Plant, X 10. 9. Apex of 

 leaf, X 183. 10 and 11. Upper stem leaves, X 20. 12. Lower stem leaf, X 20. 

 13. Median cells of leaf, X 183. 14. Cross-section of leaf about half way down, 

 X 124. 15. Basal cells on one side of costa, X 124. 



Plate 22 



Pterogoneurum Roseae. i. Plant about natural size. 2. Upper leaf, X 10. 3. 

 Lower leaf, X 10. 4. Inner perichaetial leaf, X 10. 5. Calyptra, X 10. 6. Cells 

 at the shoulder of leaf about half way up blade, X 124. 7. Apex of leaf-blade, X 46. 

 8. Capsule, X 10. 9. Half a cross-section near the middle of leaf, X 124. 10. Part 

 of peristome, annulus and rim of capsule, X 124. 11. Basal cells from margin 

 extending only part of the way to costa, X 124. 



Crossidium Rosei. 12. Plant about natural size. 13. Calyptra, X 11. 14 and 



15. Upper and middle stem leaves, X 18. 16. Basal cells on one side of costa, 



X 124. 17. Capsule, X n. 18. Median leaf cells, X 124. 19. Cross-section about 



one third down leaf, X 103. 20. Part of peristome, annulus and rim of capsule, 



X 124. 



Plate 23 



Pseudocrossidium chilense. 1. Plant about natural size. 2. Plant, X 9. 3 and 

 4. Perichaetial leaves, X 20. 5. Basal cells on one side of costa, X 124. 6 and 7. 

 Upper and middle stem leaves, X 20. 8. Median cells of leaf, X 183. 9. Cross- 

 section of leaf below the middle, X 124. 10. Cross-section above the middle, X 183. 



Pseudocrossidium apiculatum. 11. Plant about natural size. 12. Plant, X 6. 

 13. Stem-leaves, X 13. 14. Perichaetial leaf, X 13. 15. Cells in upper leaf about 

 midway between margin and costa, X 183. 16. Cells just above the rectangular 

 basal cells, X 183. 17. Cross-section of leaf about one third down, X 124. 18. 

 Basal cells of leaf from margin to costa, X 124. 19. Cross-section of a second leaf, 

 X 183. 



Plate 24 

 Torlula tninuscula. i. Plant about natural size. 2. Calyptra, X 14. 3. Cap- 

 sule, X 14. 4. Median exothecal cells, X 124. 5. Median cells of leaf, X 183. 6. 

 Part of peristome, annulus and rim of capsule, X 183. 7. Perichaetial leaf, X 20. 

 8 and 9. Stem leaves, X 20. 10. Basal cells of leaf from margin to costa, X 183. 

 II. Cross-sections of costa in upper part and near the middle, X 183. 



Toriula limensis. 12. Plant about natural size. 13 and 14. Stem-leaves, X 6. 

 15. Capsule, X 6. 16. Calyptra, X 6. 17. Cross-section of leaf , X 124. 18. Apex 

 of leaf-blade and costa on under side, X 124. 19. Median cells of leaf, X 124. 20. 

 Basal cells of leaf from margin to costa, X 124. 21. Part of peristome, annulus and 

 rim of capsule, X 124. 



