424 Transactions. — Botany. 



also the longest upper leaves of any of the New Zealand 

 species I have yet seen. 



The points of difference between a very great number of 

 species of this genus are of the most minute character, and 

 more details should have been given in describing species of 

 this genus (as well as others) than appears to be the case 

 in a large number of instances. The consequence is that 

 it is impossible to identify a large number of mosses from 

 their meagre printed description alone, owing to the very 

 great similarity in point of detail between one species and 

 another. 



I have therefore treated the whole of the plants collected 

 by me as new species, with the exception of 0. graplriomitrium 

 (Dr. Midler). There is just a possibility of some of these 

 being plants already discovered and described ; at the same 

 time, it is more probable that all the mosses described in this 

 paper are new. 



Section A. 

 Calyptra pilose. Peristome single. 



3 . Orthotrichum conicorostrum, sp. nov. 



2. „ pulvinatum, sp. nov. 



3. „ breve, sp. nov. 



4. „ ornatum, sp. nov. 



■5. „ gracillimum, sp. nov. 



6. „ calcareum, sp. nov. 



7. „ obliquum, sp. nov. 



8. „ flexifolium, sp. nov. 



9. „ lancifolium, sp. nov. 



10. „ clintonii, sp. nov. 



11. „ inaequale, sp. nov. 



12. „ benmorense, sp. nov. 



13. „ firabriatum, sp. nov. 



14. „ reflexum, sp. nov. 



15. " latorum, sp. nov, 



Section B. 

 Calyptra pilose. Peristome double. 



16. Orthotrichum cylindrothecum, sp. nov. 



17. „ tortulosum, sp. nov. 



18. „ longithecum, sp. nov. 



19. „ anomalum, sp. nov. 



20. „ brevisetum, sp. nov. 



21. „ acuminatum, sp. nov. 



22. „ obesum, sp. nov. 



23. „ magnothecum, sp. nov. 



