PLATE 2 
EXPLAXATIOX OF FIGURES 
4 Specimen reacting to a non-motile bacterial glea by constricting it with 
the pseudopods a and b. The larger lobe of the glea was ingested and broken 
up and the fragments delivered to small food vacuoles within the endoplasm of 
the ameba. X 200. 
5 Specimen with fragments of Oscillatoria (0) in various stages of digestion 
(as shown by color) within the endoplasm. The ameba is cutting off the retreat 
of a quiet Chilomonas by means of the advancing pseudopods A and B. X 100. 
6 An ameba against the side of which a motile mass of bacteria (.4) was play- 
ing. The animal did not react to this stimulation. In reacting to some Chilo- 
monases, that lay at the margin of a hanging drop in water that was shallow, 
the ameba sent out ectoplasmic pseudopods, a and a'. When a had grown to 
contour b an ectoplasmic wall was thrown over the top of the flagellates. These 
animals were thus caught in an ectoplasmic enclosure instead of one that was 
formed of both ectoplasm and endoplasm. X 200. 
7 As the ameba was sending pseudopods a-b, and a' about two Chilomonases, 
a third Chilomonas came to lie along the outer margin of a'. In reacting to this 
third flagellate pseudopods c and c' were thrown out. X 200. 
8 While pseudopods a and b were advancing along each side of a Chilomonas, 
they collided at the same time with a solid bod^^ The growth of pseudopod b was 
now inhibited, while a advanced to contours c and d and finally surrounded com- 
pletely the prey. X 200. 
416 
