322 
MAYNARD M. METCALF 
EXPLANATION OF FIGURES 
24 Amoeba currens, n. sp. 
25 Schema of hypothetical life-cycle of Amoeba proteus. a. Large "vegeta- 
tive" individual (after Leidy). b. Large ''vegetative" individual in fission (after 
Leidy). c. A somewhat smaller "vegetative" individual, a product of division, 
d-f . Stages in the formation of endoamoebospores, as described by Scheel. These 
figures are too large in comparison with a-c, so also are figures m-w. g-1. Stages 
in the growth of these Endoamoebospores into large " vegetative"individuals. 
m-q. Stages in the formation of gemmules. r. Amoeboid gemmules just freed, 
•s. A similar gemmules which has become biflagellate. t-w. Copulation of flagel- 
lospores to form an Amoeboid copula, x-z. Stages in the growth of such a copula 
into a large "vegetative" individual. The evidence that such individuals as that 
shown in figure n are derived from Scheel's endoamoebospores is not satisfying. 
This schema is therefore hypothetical as to the interrelations of the several types 
of reproduction in the one life history. 
