FIG. 98. Orbitolites complanatus, a rhizopod-cell from the Red Sea (small specimen magnified 

 about forty times ; natural size of adults upon an average 5 mm.). The central protoplasmic 

 body is enclosed in a round, disc-shaped, calcareous shell, which consists of innumerable 

 chambers arranged essentially in concentric rings. The protoplasm of each chamber contains 

 one or more nuclei. At the periphery of the shell numerous fine, straight, filose pseudopodia 

 protrude, often reaching in large specimens a length of almost 20 mm. ; these branch greatly 

 and amalgamate with one another. Very beautiful protoplasmic and granular streaming may 

 be seen upon them. 



