( 700 ) 



(ihre. liiUM-estijijLi' ;iiv llic cultiii-c^ olilaiiicd in \]\\s way oï ( '/n/cfonil/nn 

 kimzcainini, wliicli sonicliinos produces ;i carmiiic-rod piiinieiil and 

 w liicli forms dark ihmI |>('rilli(H'ia(\ (lic asci of \\ liicli conlain eiiilil ui-ey 

 s|)orcs; tliose of ( 'li<i('fom<'ll<i liorndd, wliidi forms delicate black liairv 

 |)\('nidiae. and |>arlicnlarlv those of PiircnochacUi Ininiicohi, wliicjj 

 produces an intejise Mack |»i,umeiif, stable towards acids and alkalis, 

 and wliicli commnnicales a dark colour lo the fibres, cpiile resembliujj; 

 ihc humus colorin,ii- matters. This latter si)ecies iunvever, g-i-ew more 

 readilv on lUi alkaline medium, so that we pi-efered in this case the 

 said drenched papei' <liscs, between which Mi»- NIl^ PO^ had been sj)nn- 

 kled. An intei-estiuLi,- culture is also that of S>r(l<ii'i<i liiiiii'i<-i>hi , as 

 this ascomycete is oidy then capable of formin<i' perilhecia on pajter 

 discs, \vhen these <ii\e jio longer any i-eaclion on ammonia (»r mlrates. 

 liesides the above-named sj)ecies, a luxui-ions growth was oblaine<l 

 of TricJii>chi(liinn nspcnnii, Mi/coi/onc jnicciinonli's and Sfrii/p/ii//ifiiN 

 iinicrosporoideinii, which three sj)ecies exhibit great similarity both 

 in their mor[)hological and physiological |»roperties. /•JihCocoiiu jmr- 

 iiiint.'^ceDs also grew strongly on the |>aper and formed a pui-ple- 

 red |>igment. This species I met scxeral tinie> in the air and also 

 (in company with ( lit(U>spi>i-nini ln'rlxd-iiin] on half decayed leaves 

 of Pit pubis hdlsiiiu/i'i'K . 



Cidtnres of tliese moulds were not only made on pa|)er discs, but 

 also on cellnlose in Kki.knmkvkk llasks, inh» which was introduced a 

 thin la\(')* of the following cullure liipiid : 



Tapwaler 100. paper-pulp 2. Nil, NO, 0.05, KlI, 1*(), 0,05. 



In ihis case a i-epeated addition of NTl,Nt), |»ro\ed very advant- 

 ageous. On the pidp the cellulose-destroyers grow still bellei' than 

 on the paper discs and in 3 or 4 days the cellulose is conxerted 

 by the mycelium into a coherent mass. Afterwards, the fruclilication 

 oi'gans ap[)ear. and with /iofri/f/s ruhjiiris e\"en formal i(»n ofsclerotia 

 was obserxetl. 



The destruction of the cellulose may be regarded as certain wlien 

 strong growth on the pajter di.scs and oji the paper pidp are being 

 ol>serve(l. Tlie impurities contained in the paper may also cause 

 a slight growth of moulds which do not attack cellidose, but 

 these soon cease to develop. The decomposition may be seen 

 very clearly l)v a microscopic examination of the cultures on -filter- 

 paper, when these iiave stood a long time. It will then strike ns 

 how a large nundxM- of fibres ha\ e suffered a process of dissoliilion; 

 sometimes pores are formed perpendicularly to the direction of the 

 fibre, sometimes the fibres have disintegrated into fibrilhie. Fig. 9 



