EXPLANATION OF PLATES 



PLATE I 



g = 11OO 



When observing the white Mycelium of truffle, without colouring it, it is quite im- 

 possible to detect partitions therein and seems to be like a Mucorinea, so as even to be 

 taken for a Mortierella. 



FIG. 1. -- The main filament (looked at in the cell) is branching. Magnifying : 85. 



FIG. 2. -- Its outline is an irregular one and in its inner side one perceives a very 

 granular protoplasma, spangled with numerous oildrops. 



FIG. 3. -- The filaments are often connected by anastomoses. 



FIG. 4. Their outline is very irregular and shows strumas as well as narrowness 

 owing to the microscopical structure of the fungus. (See plate III.) 



FIG. 5. -- Some strumas of the main filament are like the Chlamidosporea of the 

 Mucorinea. 



FIG. 5'. -- Sometimes they are met with where ramifications are branching off. 



FIG. 6 & 7. - - Towards the end of the main filament and less on its length we 

 perceive, on small branches, ovoid and globular lumps of different shapes and containing 

 one or two oildrops, which seem to be the isolated Conidea of the Mortierella. 



FIG. 8 & 9. -- But some of them are prolonged at their end by a filament; so as to 

 leave very little possibility of their being Conidea. (See fig. 22.) Their inner structure 

 seems, moreover, to show that they are single strumas of the filament. 



FIG. 10 & 11. -- At its end, the main filament forms secondary ramifications, thin 

 enough to give them a thready looking. 



PLATE II 



ng = 11OO 



When colouring the white Mycelium of truffle there is no possibility of detecting any 

 kind of partition in the main filament owing to the liquid therein contained, but we 

 observe that the secondary branches at the ends are obviously partitionned. 



FIG. 12, 13 & 14. -- Said thready ramifications, formed by lengthened cells, of an 

 equal length, are branching on the ends of the main filament; sometimes they are also, 

 in a variable number, branching on its side-strumas. Their contents are vitreous. 



