Revisional Study of the Order Palaeodictyoptera in the Upper Carboniferous Shales of Commentry, France Part II

An introductory discussion of the Palaeodictyoptera found in theCommentry shales and of the coIlection in the Institut de Paléontologiein Paris, as well as an account of the background of thisinvestigation, was included in the first part of these studies. Thepresent part deals with the following seven families: Homoiopteridae,Lycocercidae, Graphiptilidae, Breyeriidae, Eugereonidae, Archaemego-aptilidae and Megaptilidae. Compared with the Spilapteridae, consideredin Part I, all of these families are small, consisting of onlya few genera, at least from the Commentry shales. However, theyshow much diversity of structure and indicate the extensive range ofwing modifications which occurred in the Palaeodictyoptera, including the reduction and shortening of the hind wings. The third partof this study will deal with the Dictyoneuridae, which provide uswith more information about the body structure in this order ofinsects