PLATE I. 



All spores shown magnified 800 times, cystidia and surface-cells 300 t. Tin 



numbers correspond to the current no. of each species in the text. 



(All figures are from fresh material: no dried or preserved specimens used.) 



3. 



4a. 



4b. 



10. 



11. 



12. 



13. 



14a. 



14b 



15. 



Pluteus. 



P. cervinus spore cystidium from edge and face 



- salicinus — — — 



- petasatus — 



- pellitus — — — 



— var — — — — 



- gracilis — surface-cell 



- Roberti — (of a and b — 



- hispidulus — — 



- plautus — 



- cinereus — — 



- semibulbosus — — — 



- Godeyi var — 



- cinereo-fnscus — 



- nanus — — 



— lutescens — — 



- chrysophæus surface-cells. 



Collybia. 



1. C. (Arm. mucida, spore 



2. - radicata (arrhiza) — cystidium 



3. - platyphylla. ... — 



4. - maculata — 



5. - distorta — 



6. - butyracea .... — 



7. - fusipes — 



8. - velutipes — 



9. - dryophila .... — 



10. - macilenta .... — 



11. - nitellina — 



12. - tenacella — 



13. - confluens — 



14. - conigena — 



15. C. tuberosa .' spore 



16. - cirrhata — 



17. - racemosa — 



19. - rancida — 



20. - inolens — 



21. - murina — 



22. - clusilis — 



23. - miser — 



24. - ozes — 



25. - mephitica — 



26. - cessans — 



27a. - erosa — 



28. - tesquorum — 



