THE MYCETOZOA 135 



FIG. 36. STAGES IN THE LIFE OF DIDYMIUM DIFFORME, 



DUBY. 



1, PLASMODIUM OR CREEPING FILM ON A DEAD LEAF ; 



2, DIFFERENT VARIATIONS AND STAGES SHOWN AS IF ON THE SAME LEAF : 



1, the smallest discrete elements ; 2, larger discrete elements separated 

 from a continuous patch, which at one point 3, is heaped up in a 

 rounded nodule with small secondary projections ; 4, sporangia, 

 dark from the purple spores ; 



3, SPORES, CAPILLITIUM FILAMENTS, AND CRYSTALS : one of the spores 



has not yet formed its capsule, the beginning of which process I 

 watched under the microscope. In its early stage the capsule is of 

 a rose-colour, later the pigment is purple-brown and is condensed in 

 the points which project from the surface of the capsule. Drawing 

 eyepiece. X 800 diams. ; 



4, THE HATCHING PROCESS : a, spore , b. swarm-cell escaping from spore- 



case ; c, newly hatched swarm-cell containing a nucleus and three 

 vacuoles ; d, flagellated swarm-cell ; e, swarm-cell with two vacuoles 

 containing bacteria, and produced at the posterior end into pseudo- 

 podia, to one of which a bacterium is attached : /, amoeboid swarm - 

 cell. X 720. After A. Lister ; 



5, STAGES IN THE INCEPTION OF A BACILLUS BY A ZOOSPORE. After A. 



Lister ; 



6, YOUNG PLASMODIUM WITH ATTENDANT AMOEBOID SWARM-CELLS, SOME 



OF WHICH HAVE TURNED INTO MiCROCYSTS : v, vacuole containing a 

 microcyst ; ,<?, empty spore-cell, x 450 diarns. After A. lister. 



