GEANTIA 79 



slide and examine with a high power. !Note the great 

 number of amoeboid cells with their processes, of sin- 

 gle and clustered flagellate cells, of spicules embedded 

 in amoeboid cells, of diatoms and other foreign bodies 

 which wash out of the sponge body. 



Eun a drop of Delafield's heematoxyhn under the 

 cover -glass and note the distinctness with which the 

 nuclei of various cells are brought out, also the collars 

 and flagella of cells from the endoderm. Compare these 

 cells with the ciliated cells examined on page 26. 



Look for amoeboid cells which have ingested diatoms, 

 plant-spores, etc. 



