The Sande Society is a fellowship of women found in West African cultures, which aims at preparing girls for adulthood. 
Mother Earth, life & soil. The representation of the earth is depicted as a female antelope with a baby carried on it's back. This could represent fertility and growth in the soil for a good harvest.
I'm still learning about the Chi Wara head dresses. This topic fascinates me and I hope it interest you also. As I learn more about African Art I will share my findings with you. In this photo, you can see the attached head dressing worn by Bambara dancers.
Be sure to read my post about chi wara, titled Art & Art History - Representing the Spirit of Chi Wara on the home page.