250 FUNGI. 



1 



in little translucent flakes or scales, an erect olivaceous mould 

 appeared, and the patches extended to nearly an inch in 

 diameter, maintaining an almost universal circular form. This 

 new mould sometimes possessed a dirty reddish tint, but was 

 commonly dark olive. There could be no mistake about the 

 genus to which this mould belonged ; it had all the essential 

 characters of Penicillium. Erect jointed threads, branched in 

 the upper portion in a fasciculate manner, and bearing long 

 beaded threads of spores, which formed a tassel-like head, at 

 the apex of each fertile thread. Although at first reminded of 

 Penicillium olivaceum, of Corda, by the colour of this species, it 

 was found to differ in the spores being oblong instead of globose, 

 and the ramifications of the flocci were different. Unable again 

 to find a described species of Penicillium with which this new 

 mould would agree, it was described under the name of Peni- 

 cillium cnartarum* 



Almost simultaneously, or but shortly after the perfection 

 of the spores of Penicillium^ other and very similar patches 

 appeared, distinguished by the naked eye more particularly by 

 their dendritic form. This peculiarity seemed to result from the 

 dwarfed habit of the third fungus, since the varnish, though 

 cracked and raised, was not cast off, but remained in small 

 angular fragments, giving to the spots their dendritic appearance, 

 the dark spores of the fungus protruding through the fissures. 

 This same mould was also found in many cases growing in the 

 same spots amongst Penicillium cJiartarum, but whether from 

 the same mycelium could not be determined. 



The distinguishing features of this fungus consist in an 

 extensive mycelium of delicate threads, from which arise 

 numerous erect branches, bearing at the apex dark brown 

 opaque spores. Sometimes the branches were again shortly 

 branched, but in the majority of instances were single. The 

 septate spores had from two to four divisions, many of them 

 divided again by cross septa in the longitudinal direction of the 

 spore, so as to impart a muriform appearance. As far as the 

 structure and appearance of the spores are concerned, they re- 

 * Cooke's "Handbook of British Fungi," p. 602. 



