Does the index survey the region's mythology in the illustrated encyclopedia of Aztec and Maya?

Yes, the index of the illustrated encyclopedia of Aztec and Maya likely includes entries related to the region's mythology, as mythology is a significant aspect of both Aztec and Maya cultures. Readers can refer to the index to find information on specific deities, myths, and legends within the encyclopedia.

The provided text does not mention an encyclopedia, so I cannot answer the question.