On a Confervoid State of ' Mucor cluvatus. 343 



at length placed in a room in which a fire was constantly kept up, 

 the temperature being seldom below 60° of Fahrenheit, and the 

 patches soon became smaller, but indicated signs of fructification. 

 It was in a short time clear that the plant was a state of Mucor 

 clavatus, Lk. which was further proved by the developement of that 

 species upon the skins of the raisins, which had been thrown into a 

 tub in which were some brewers' grains. It is curious that in this 

 latter case there was scarcely any trace of a Mycelium. 



The Mycelium of the Penicillium before fructification, though 

 more or less submerged, had little in it remarkable, consisting of 

 extremely fine branched, articulated, pellucid threads. 



a. State of Mucor clavatus, in outline, highly magnified, b. A 

 portion of the same to show the contents of the articulations, c. 

 Perfect fertile threads, with sporangia and columella. 



