CANNIBALISM IN AMOEBA 709 



EXPLANATION OF PLATES 28 AND 29. 

 Plate 28. 



Fig. 1. — An Amoeba vespertilio with vesicular nucleus winch 

 shows well the ineshwork structure of the endosome (E) and the clear 

 halo round it. In the cytoplasm is a large vacuole (vacl) containing 

 another amoeba with its nucleus (».l). This second amoeba contains 

 a vacuole (vac. 2) which encloses a third amoeba and its nucleus {n.2). 

 The third amoeba contains another vacuole (vac. 3) which encloses a 

 fourth amoeba and its nucleus (n.S). Ect., Ectoplasm. End., Endoplasm. 



Fig. 2.- — -An Am oeba vespertilio with its nucleus (N). The amoeba 

 contams food vacuoles and a vacuole {vac.l) in which is a second amoeba 

 with its nucleus {n.\) and two food vacuoles containing diatoms. This 

 second amoeba contains in a vacuole [vac. 2) a third amoeba with its 

 nucleus {n.2). 



Fig. 3. — A free sphere containing diatoms in food vacuoles {d). n, nucleus. 



Fig. 4. — An amoeba with its nucleus (N) and two vacuoles. In one of 

 the latter lies a second amoeba with its nucleus (%.3). In the other is 

 a third amoeba with its nucleus {n.\), and this again contains a fourth 

 amoeba with its nucleus {n.2). 



Fig. 5. — An amoeba with its nucleus (iV) and food vacuoles (/'.?>.), which 

 has ingested one other amoeba with its nucleus («) and food vacuoles 

 {f.h.l). 



Fig. 6. — A typical free sphere, extruded from an amoeba (compare with 

 the ingested amoeba in fig. 5). The structure of the nucleus is well shown 

 (compare with the nucleus of the outer amoeba in figs. 1, 2, and 4). 



Plate 29. 



Fig. 7.— An amoeba with its nucleus {N) and a food vacuole {f.vac). 

 It contains three other vacuoles, in two of which two other amoebae lie. 

 One of these, with its nucleus {n.\) is free from food bodies ; the other, 

 with its nucleus {n.2) contains diatoms. The third vacuole contains an 

 amoeba with its nucleus (/j.S), which itself contains a food vacuole, 

 {f. vac.l) and three other amoebae with their nuclei (vt.4, n.5, and n.%), 

 the latter being free from food bodies. 



Fig. 8. — ^An amoeba containing two other amoebae in separate vacuoles, 

 one of which is a typical sphere, the other an elongate oval. Both the 

 ingested amoebae contain food bodies. 



Fig. 9. — A star-shaped form of Amoeba vespertilio with its 

 nucleus {N) and food vacuole (/.&.). It contams another amoeba with its 

 nucleus («,) and food bodies {f.h.l) (cf. PI. 28, fig. 5). 



