66 



RESEARCHES OX FUNGI 



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FlO. 'i.i.—Coiirinwt plicatib's. Geotropic swiiiniim and adjust- 

 iiifiit of the ]>ilciis in sitace. A finit-liiMly was jilacoil 

 in tlie ])()siti()n sliown at a, and aflcr J lionrs it had 

 assumed tin- ])i>siti(>n sliowii at h. 'I'lic skctdics h-o wcri' 

 made in succession at intervals of lialf-an-lKiur. yMvas 

 drawn 1 liour after <i. Tlie jdane of tlie l)ase of llie 

 ])ilens ))ecanie liori/.ontal after :! Iiours (</), niiicli over- 

 tilt(!d after 4 lioi;rs( ,/' ), ai^ain liorizonlal after f. liours(/i), 

 inudi over-lilted a^iiiii after iMi:'' li<turs (./ and 1 1, ayain 

 horizontal after V-'i liours, very slightly over-tilted for 

 the last time after S hours (o), and linally horizontal 

 after ha liours (o). The Iiorizontal iiositi<m was still 

 malutaint'd after 'JTi hours (7/ ). Natural size. 



once more to the extent 

 of about 2° (v). It then 

 I'ebent itself for the fourth 

 and hist time, and brought 

 the plane of the pileus 

 into a horizontal position, 

 where it finally remained 

 (0 and p). The sketches 

 h to in Fig. 24 Averc all 

 made in succession at in- 

 tervals of half- an- hour. 

 The formation of a black 

 spore- deposit beneath the 

 fruit - body Avas noticed 

 subsequently to the 

 stage j. 



The physiological 

 swinging of a fruit-body 

 of Coprinus plicatilis 

 about its objective and 

 final position forcibly 

 reminds one of the oscil- 

 latory movements of a 

 pendulum under the 

 action of gravity. It 

 finds its parallel in the 

 well-known geotropic re- 

 sponses of shoots in the 

 Phanerogamia. We are 

 thus provided with an- 

 other striking piece of 

 evidence that protoplasm 

 has the same fundamental 

 characteristics through- 

 out the vegetable king- 

 dom. A further investi- 

 gation upon the pheno- 



