Transmission processes in the Burmese cult known as the cult of the Thirty- Seven Lords are examined here through the analysis of three succession cases among the ritual specialists of this cult. I seek to understand how transmission works in a cult whose main ritual manifestation is spirit possession that involves the logic of inspiration and vocation, rather than the logic of reproduction and succession. A careful examination of contrasted cases reveals that succession among spirit mediums, rather than obeying fixed rules, actually involves the differentiated transmission of assets made of ritual property, functions, positions, and knowledge. Various combinations -- of spirit possession and affiliation or fictive kinship, of inspiration and tradition -- appear to operate at different levels of the cult, with inversions of values sustaining both its dynamics and its reproduction. keywords: spirit possession--ritual specialists--transmission--succession--tradition