_______________________________________________________________________ The euglenoid alga Phacus sp. 25X

When identification and counting of algae and other water inhabitants is being done (not by me), a common question is "what is it?". A 25X photo is quick, and can be blown up later to examine details. The full picture size is never trimmed down to frame the subject. It is much more important to be able to relate the size of the subject to the objective power being used. Behind the Phacus is a cross-shaped unknown object. A separate 25X picture was taken of this, and it was identified tentatively as the yellow-green alga Pseudotetrahedron.