Tab. 410, On October 12, tlic same year, William 

 Lewis, Esq. sent me from Hendon, the leaves of a Char- 

 montelle pear-tree, whicli grew against an open fence, the 

 inclination of which was to the South-East. The upper sur- 

 face of these leaves contained, to all appearance, the same 

 parasite as above, in the older or latter state; and imme- 

 diately under it, as it were, the lower half of the leaf Mas 

 swelled into irregular protuberances, more prominent than 

 the conical forms on the opposite side, including in their 

 centres a sort of capsule, which in the more central ones ol' 

 the group emerges from them more than half its length, the 

 apex of these have a central knob or embossment, from 

 which a number of fdaments descend, giving it a somewhat 

 pyriform appearance, a line in length, forming to the base, 

 or being divided in peculiar lines, so as to allow seeds to 

 pass out, which were apparently arranged in order upon 

 them as upon a receptacle. 



This Fungus, which grows under the leaves has been con- 

 sidered a distinct species ; but from these specimens it seems 

 scarcely doubtful that they are analogous to the dioecious 

 class of plants, and are of one and the same species. Those 

 on the upper side of the leaf might have been considered, if 

 alone, as a Sphaeria, but as they may belong to tbe opposite 

 parasite, they must be included as one dioicous species. 



Monsieur De CandoUe speaks of the upper one as being in 

 points or spots opposite and attendant on the under one. 

 The peculiarities of particular Fungi will afford much enter- 

 tainment, but proper research would take up more agreeable 

 time than falls to my lot at present. 



