8 The Mycetozoa, and 



thing so called is protoplasm without any containing 

 wall, and therefore does not answer to the notion of a cell 

 as it exists in a beehive or in a police station. We shall 

 therefore speak of them as swarm spores, though even 

 that name seems to us to he far from felicitous. 



The next step in the life of these swarm spores is that 



FIG. 4. Streaming plasmodium of Didymivm leucopus. 

 (After Cienkowski.) 



they rapidly increase by bi-partition, i.e., splitting into two 

 parts. An occasional phenomenon here sometimes inter- 

 venes. At times the swarm spores assume a globular form, 

 and become covered with a hard coating, and in that 



