The bibliographic index lists by larger zoologic groups all genera, species, and varieties of Permian invertebrates described through the year 1941 and those described in available literature through June 1946. The author, date, and reference are given for each generic name. The original reference and all subsequent references which contain emendations or illustrations are given for each specific and varietal name Synonymy is given for 8081 specific and varietal names. Homonyms are indicated The list of references contains 1332 titles.