I can't tell exactly anymore? I just remember standing next to the vet, while she picked them off of it on a table with tweezers. Under bright lights and a looking/magnifying glass on a flexible arm. They've been maybe a millimeter long, at max. 2mm ? I could barely see them, if not for the bright lights and they being black brownish on a white sheet.

edit: This had to be the summer of 1981, 1982 or 1983, not later.