100 On the Fructification of Hymenomycetous Fungi. 



EXPLANATION OF PLATES. 



PLATE IV. 



Fig. 1 . Section of gill from a very young specimen of a var. of Ag. micaceus, 

 showing the young sporophores not yet distinct from the other cells 

 of the hymenium. 



2. Ditto, in a specimen rather more advanced. The sporophores have 



become more cylindrical, and are longer than the other cells. The 

 central cellular substance of the gill is distinctly marked. 



3. The sporophores have acquired four spicules. 



4. Section very highly magnified, showing the spores just beginning to 



be developed, and a sporophore with four spores more advanced. 



5. Tip of sporophore, with four infant spores, magnified 600 diameters. 



6. Ditto, with four mature spores. 



7. A spore seen from one side. 



8. Ditto seen from behind. 



9. Portion of gill of Ag. momentaneus, with two sporophores and an 



utricle. 



10. Ditto of Ag. macrocephalus, showing an utricle, with sporophores 



and spores in various stages of growth. 



11. A form sometimes assumed by the utricles in very young plants. 



12. Utricle. 



13. Part of a gill of Ag. striatus, showing the disposition of the sporo- 



phores, each of which is marked with four dots, which are the 

 tips of the spicules. 



14. Sporophores in Ag. Phalloides. 



15. Tip of sporophore, with its four spores in Ag. nebularis. 



16. Portion of gill of Ag. velutipes, from a sketch by Mr. Cornelius 



Varley, very highly magnified. 



17. Tip of sporophore of Ag.flexuosus, with its two echinulate spores. 



1 8. Sporophore of Ag. Volemum with its four echinulate spores. 



19. Spore of the same. 



20. Portion of hymenium of Ag. pudens. Two of the utricles are 



crowned with a transparent globule ; in one the globule has va- 

 nished, and another is obtuse without anv crown. 



21. Portion of hymenium of Ag. balaninus, with its coloured utricles. 



The structure of Ag. pelianthinus is similar. 



22. Sporophores of Ag.fertilis, var. intybaceus. 



23. Spores. 



24. Spores of Ag. chalybeus and Ag. asprellus with their nuclei. 



25. Portion of hymenium of Ag. tener. 



26. Portion of hymenium and pileus of Ag. rimosus. 



27. Hymenium of Ag. involutus, with utricles. 

 2S. Spores of ditto. 



PLATE V. 



29. Hymenium of Ag. pusillus, with an utricle and a sporophore bear- 



ing two spicules. 



30. Hymenium of Ag. semiovatus. 



31. Hymenium of Gomphus rutilus, with utricles. 



32. Sporophore of ditto. 



33. Spore. 



34. Tip of sporophore of Ag. ostreatus. 



35. Spore. 



36. Portion of hymenium of Cantharellus cibarius. 



37. Ditto of Cantharellus cornucopioides. 



