298 Lister . — On Ckondrioderma difforme , etc . 
EXPLANATION OF FIGURES IN PLATE XVI. 
Illustrating Mr. Arthur Lister’s Notes on Ckondrioderma difforme 
and other Mycetozoa. 
Fig. 1. Two sporangia of Ckondrioderma difforme on elm leaf, showing outer 
calcareous and membraneous walls, x 40. 
Fig. 2. Base of sporangium, the spores removed, showing fragment of calcareous 
wall (a), attached to thickened margin ( 6 ), with capillitium springing from the 
membranous inner wall (V). x 100. 
Fig, 3. Capillitium of usual character in well-developed specimens. 
Fig. 4. (a) Capillitium of sporangium from elm leaf, the spores of which were 
sown on blotting-paper with seeds of garden cress. 310 sporangia were developed 
in this cultivation during eleven weeks ; ( b ) capillitium from one of these sporangia 
in which the threads were abundant ; ( c ) capillitium from a cluster of four from 
the same cultivation, in each of which the threads were very scanty and colourless. 
Fig. 5. Early formation of plasmodium, the nucleus of each of the swarm-cells 
of which it is composed remaining distinct. 
Fig. 6. Two plasmodia approaching each other and about to coalesce : in one 
of them six spores are temporarily incorporated : (a) a microcyst enclosed in a 
vacuole, (b) amoeboid swarm-cells and microcysts. 
Fig. 7. The two plasmodia after coalescence, drawn ten minutes after Fig. 6. 
Fig. 8. Swarm-cell with the cilium withdrawn, embracing a bacillus, two smaller 
bacilli having been ingested a few minutes previously. 
Fig. 9. The same swarm-cell with bacillus enclosed in a vacuole. 
Fig. 10. The same after an interval of an hour having resumed active move- 
ment, the bacilli and their enclosing vacuoles having disappeared. 
