SUMMARYThe species ofAbsidia, except those with globose or cylindrical sporangiospores reported in earlier papers, are described and include:A. verticillata, A. hyalospora, A. blakesleeana, A. repens, A. parricida, and a new speciesA. zychae.A following paper will describe the remaining species in this group, but these additional forms are given in a key to all the species in this paper. Also included is the single species with cuneate-shaped spores,A. cuneospora.In addition a new genus,Chlamydoabsidiaand its single species,C. padeni, are described based upon anAbsidia-like fungus possessing regularly dark-colored, septate spores on aerial stalks arising from the stolons. The zygospores are described for all of the species exceptC. padeni, A. hyalospora, andA. zychae.One species,C. parricida, is parasitic on other mucors.