EUROTIUM 485 



place the plums on the plate, and infect them by transferring 

 a few conidia from as pure a patch of the mould as can be found 

 on the bread : the transfer is to be made with a needle which has 

 previously been heated. If these precautions are taken, and the 

 plums be kept covered, a pure culture of the Fungus should be 

 obtained. 



II. From a pure patch of this green Mould remove a 

 small portion with a needle, avoiding mechanical rough- 

 ness as much as possible : lay it on a slide, moisten with 

 a single drop of alcohol, then add water, and cover 

 gently with a cover-slip. Examine it under a low 

 power, and observe 



1. The stalked conidiophores, with large, mop-like 

 heads. 



2. The colourless tangled mycelium attached to 

 these, and from which they spring. 



3. The innumerable detached conidia which will be 

 found thickly distributed throughout the preparation. 



Having selected one of the largest of the conidio- 

 phores, examine it in detail under a high power, noting 

 especially 



1. The robust stalk, usually without septa : its wall 

 is clearly defined, and the protoplasmic contents granular 

 and vacuolated. 



2. The transversely septate, branched mycelium, 

 from which the conidiophores arise as vertically growing 

 branches, usually from a point immediately behind one 

 of the septa : in this as in other cases of branching 

 of the mycelium, the branch grows out at right angles 

 from the hypha which bears it. 



3. The swollen spherical head of the conidiophore, 

 with its conidia in radiating rows inserted upon it. 



