My eyes are opened.

Thanks for that, Ferry.
It's interesting how expectations can direct (or misdirect) perception. At first, taking the filopodia for cirri, I simply disregarded the very conspicuous soft appendage visible in picture #1. Having learned that the motion of the creature was amoeboid, that shape immediately jumped out as a pseudopod. I can scarcely believe I hadn't seen it clearly, before!
Then, expecting to see a test -- perhaps because I'd spent too much time staring at Francisco's Plagiophrys and its cousins! -- I interpreted the globular body as a rigid structure. However, picture #3 clearly shows that this amoeba is not testate: some pseudopods are attached to the
outer surface of the cell!
But I didn't see that until I
expected to (with Ferry's guidance).
It's one of the pleasures of this hobby, for me: as one returns to the same images, morphological features change from invisible, to subtle, to forehead-smackingly obvious.
Now, I really must go look at Wittgenstein's duck-rabbit picture again...maybe I can settle that question once and for all.
