THE CONIDIA OF FISTDLINA. 175 



the type described previously. Still they are sometimes of a stronger 

 calibre, and do not distinguish themselves from the cells of all 

 varieties of the second type, or narrow cells, but they never 

 proceed from chromogenous cells, or from reservoirs with a proper 

 juice. One sees that they proceed more often from narrow cells, but 

 more rarely still from cells more narrow than themselves ; often they 

 take birth from cells of the tremelloid tissue. I have not contented 

 myself by having proved the connection of the conidiophore cells 

 with the filamentous cells of the receptacle ; in the belief that 

 these ought not yet to be accused of belonging to a foreign, 

 mycelium, I have tried to find the point where the narrow filamen- 

 tous cell bearing a conidiophore cell was the same at all as a cell of 

 great calibre. This search has often succeeded, above all in the 

 points where the narrow conidiferous zone was found to be allied 

 with the more profound system of the great cells — in the pedicel, 

 for example, a little beneath its summit. 



One can prove from the figures given, and I have many other 

 similar designs taken at different points, that there is a complete 

 continuity between the cells of great calibre of the receptacle, and 

 those with a narrow calibre, bearing some conidiophore cells. la 

 reality, one might say that the difficulty is not in recognising these 

 connections so distinct, but rather to find any part in the tissue in 

 its normal state and its depth, a fragment of foreign mycelium. 

 I cannot help believing that in insisting upon the differences that 

 there are between the conidiophore cells and cells of the tissue of 

 the Fistulina, M. de Bary has encountered some conidia carried, as 

 frequently happens, upon the cells of the tremelloid tissue, which, 

 while presenting frequent modifications which ally them with the 

 cells of the other types, still differ rather notably, and may lead 

 one into error, if one does not know the relations of these cells 

 with the other cells of the receptacle. 



In order to give birth to conidia, the mother cell, or conidio- 

 phore cell, divides, as I have said, and each division swells at its 

 extremity. This swelling increases, and, in the interior, appears 

 an oily clot bigger than the granulations of the protoplasm which 

 fills the rest of the mother cell; at other times, at the under part, 

 appears one or more clots of similar dimensions, which deviate from 

 the centre of the conidia which form themselves successively at the 

 underside of the first. The clot, like the central nucleole of the 

 spore of the Peziza, is enclosed in a hyaline liquid containing fine 

 granulations. This peripheric portion of the protoplasm without 

 doubt serves to form the internal membrane of the conidia, the 

 development of which is only sensible by the aspect of its contour, 

 being more acute than in that of the primitive cul-de-sac of the 

 mother cell, and by the formation of a partition at the point where 

 the conidium is separated from the mother cell ; at this moment 

 the conidium only contains one refringent nucleole, at other times 

 two, and a hyaline liquid all round. Sometimes, but exceptionally, 

 it becomes granular a little before germination. In seizing all these 



