BY G. P. DARNELL-SMITH. 88 < 



EXPLANATION OF PLATES XCI.-XCIII. 



Plate xci. 



Fig. 1. — Abnormal mushroom, showing protuberances of the cap. At the 



4)ase of the stipe, two small "buttons" are seen. 

 Fig.2. — Abnormal mushroom, showing hymenium on the surface of the 

 cap. 



Plate xcii. 

 Fig. .3. — Section of the same. 



Fig. 4. — Transverse section through the liymenium on the surface of the 

 cap, showing the irregular character of the gills, and the large 

 spaces in their interior; ( x 120). 



Plate xciii. 

 Figs.S, 6, 7. — Basidia bearing varjnng numbers of sterigmata (4, 2, 1) from 



the hymenium in the surface of the cap; ( x 480). 

 Fig. 8. — Section of small "button" much enlarged, showing the formation 



of lens-shaped areas in the cap containing sporogenous tissue before 



the separation of the velum. 

 Fig. 9. — Section of a large "button" (nat. size), showing sporogenous tissue 



covered with a membrane over the whole upper surface of the cap. 



The velum has not yet split. 



