Here it is again - in a better orientation

Back to the mystery picture .

Here it is again, but now I've rotated the image so that the cell ('cos that's what it is) is now oriented in a more natural position. It is from the eye of a harvestman (Phalangida), Oligolophus agrestis. You can also see the surrounding cells.

This is a glial cell.
You can see the nucleus (n) in the cell body in the lower half of the electron micrograph. The cytoplasm around the nucleus is quite dense, with many ribosomes and dark organelles - as well as one or two which look like pigment granules, but are more probably secretory material.
Extending from the top of the cell body are somewhat irregular cylindrical projections - the glial processes (gp).

At the side of the picture are dark cells packed with pigment granules. These line the side of the retina of the eye. So, we are close to the back of the eye here, and the glial processes extend up from here to lie in between the retinulae of the retina.

These cells are well adapted to their role, and if you want to know more...