Thank you. I was not that satisfied with the results but that was because I had some trouble with an uneven background with colour shifts.

The bottom one, (I had to look it up) is Microcodon clavus. I had never seen it before. I made it with a 25X plan apo. The top image of a Polyarthra was done with a 50X leitz fluotar. It is funny that you can use it on a zeiss and the DIC effect is pretty o.k. Not very high in contrast but it gives a subtle effect.
The second and third image is of a rather plain rotifer that seems to lack an eye.
Wim