i6 



ZOOLOGY 



Gromia is a form found in both fresh and salt water ; it has a 

 membranous shell of the imperforate type, with an opening at 



Fig. 11. — Gromia miformis, 

 Duj. 



1. The shell. 



2. Protoplasm inside the 



shell. 



3. Protoplasm outside the 



shell. 



4. Numerous nuclei. 



5. A Diatom surroimded hy 



pseudopodia. 



6. Pseudopodia anastomos- 



ing. 



7. Ingested diatoms. 





one or both ends, from these the protoplasm passes out and forms 

 a layer round the outside of the shell, from which the fine 

 reticulating pseudopodia arise. The shell is thus completely 

 imbedded in protoplasm, both inside and outside. In Lieber- 



