324 
MAYNARD M. METCALF 
EXPLANATION OF FIGURES 
26-42 Amoeba proteus. 
All drawings were made with camera lucida from living individuals. 
26 Young Amoeba of the "radiosa" type. X 1500 diameters. 
27 Young Amoeba showing a few refractive plastids in the endosarc. X 1500 
diameters. 
28 Young Amoeba showing nucleus, plastids and numerous vacuoles. X 1220 
diameters. 
29 Young Amoeba with numerous plastids. X 1020 diameters. 
30 Small Amoeba with rather numerous plastids and a large number of food 
masses (conventionally shaded). X 1220 diameters. 
31-33 Stages in the formation of gemmules. 
32 Some of the gemmules have already been freed and are lying near the 
Amoeba. In fig. 33 almost all the gemmules have been freed and have moved 
away. X 1500 diameters. 
34 An active amoeba with gemmules. X 1700 diameters. 
