The bottom of the cast without the base. This is the part of the colony that is closest to the ground surface and the part of the cast that contacts the base. About 1/3 of the way down you can see an imperfect spot which is a relic of the pouring process. The bottom is the part that faces front. There are also 3 paint marks (red on the left, blue on the right, and black near the top) which help to align the cast on the base properly.