usually you observe disc shaped testate amoebae like Arcella or Centropyxis sitting flat on your glass slide, like this Centropyxis discoides:
![Image](http://hans-rothauscher.de/testaceen/pics/discoides2.png)
With some luck and glycerol I have been able to view the following two specimen from lateral. The next photos show some quite complex structural elements connecting dorsal and ventral shell, quite complex for a single-celler:
![Image](http://hans-rothauscher.de/testaceen/pics/discoides_seite_237.png)
![Image](http://hans-rothauscher.de/testaceen/pics/discoides_seite_218.png)
Diameters (from top) 240, 237 and 218 µm, Neofluar 40x, stacks of abt. 20 focal planes.
Cheers,
Hans