Fig. 9S. — OrbitoliUs complanatu^, a rhizopod-cell from the Red Sea (small specimen magnified 

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

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

 chambers arranged essenti:Uly 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 nun. ; these branch greatly 

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

 be seen upon them. 



