Blood cells of Ecteinascidia sp. stained with 2,2-bipyridine, viewed under compound microscope with Dinoscope camera system at 40X magnification. (a) Signet ring cells (black arrowheads). Morula cells (white arrowheads). Scale bar = 10μm. (b) Compartment cell (black arrowhead). Morula cell (white arrowhead). Scale bar = 10μm. (c) Lymphocyte. Scale bar = 10μm. (d) Vanadocyte. Scale bar = 10μm.