Maybe this will help :-)

"For Alocasia bulbs and Colocasia bulbs, each bulb has "eyes" or "sprouts" all around the bulb. Look for an upward pointing appearance of each sprout. That will be a clue as to which end is up. The eyes tend to look like a spade pointing up toward the top end of the bulb. For Colocasia bulbs, they are typicall bought in the stores smooth on the outside and the eyes do readily appear. For alocasia bulbs, (if you can find any) the eyes are under the husk. Peel the husk away from the bulb and notice when you peel the husk from the bulb. One end of the bulb, the husk will be free and you should peel from that end. That end indicates the top end. Peel the husk and you will see the eyes underneath. It is not necessary to remove the husk prior to planting, I only mentioned peeling to give you a clue as to how to see the eyes on the bulb."

We only find colocasia bulbs for sale here. I learned the first time I planted them to wait for the soil to warm when planting in the garden or the bulbs will rot before growing. When you look carefully at the bulb you will note one end has a single growth point in the very center of the rings. This I always plant facing up. I have never seen any "eyes", but the other end has what appears to be tiny dried roots. I just potted up 5 of them and have the pots setting on my 70 degree heat pad in the green house. I am trying to get an earlier start this year. They survive the winter here, the roots not the above ground foliage. Al