The primary goal of the present study is an exposition of the structure of Mam, a Mayan language of the Mamean group. Mam is the most widely spoken of the four Mamean languages, and has been roughly estimated to have a quarter million speakers located in the departments of Huehuetenango and San Marcos in Guatemala and in the state of Chiapas in Mexico. The study is based on stories and reports recorded in 1967-8 in Huehuetenango. The analysis is performed on the basis of the glossematic theory as put forth by Hjelmslev. This theory builds upon seven principles: the empirical principle and the principles of simplicity, economy, reduction, generalization, exhaustive description, and reduction. Following a presentation of glossematic views on the structure of language and an explanation of the notational system, the Mam verb system and sentence structure are discussed. Subsequent sections on lexematics, syllabematics, and taxematics deal with vocabulary, syllable structure and syntagmatic organization of Mam. (CLK)