Labyrinthodontia. Section I. Euglypta. Genera: _Mastodonsaurus_, Jaeger; _Capitosaurus_, Münst.; _Pachygonia_, Huxley; _Trematosaurus_, Braun; _Gonioglyptus_, Huxley; _Metopias_, von Meyer; _Labyrinthodon_, Owen; _Diadetognathus_, Miall; _Dasyceps_, Huxley; _Anthracosaurus_, Huxley. Section II. Brachyopina. Genera: _Brachyops_, Owen; _Micropholis_, Huxley; _Rhinosaurus_, Waldheim; _Bothriceps_, Huxley. Section III. Chauliodonta. Genera: _Loxomma_, Huxley; _Zygosaurus_, Eich.; _Melosaurus_, Meyer. Section IV. Arthroödonta. Genera: _Batrachiderpeton_, Hancock and Atthey; _Pteroplax_, Hancock and Atthey. Section V. An uncharacterized group. Genera: _Pholidogaster_, Huxley; _Ichthyerpeton_, Huxley; _Pholiderpeton_, Huxley. Section VI. Archegosauria, von Meyer. Genera: _Archegosaurus_, Goldfuss. Section VII. Heleothrepta. Genera: _Lepterpeton_, Huxley. Section VIII. Nectridea. Genera: _Urocordylus_, Huxley; _Keraterpeton_, Huxley. Section IX. Aistopoda. Genera: _Ophiderpeton_, Huxley; _Dolichosoma_, Huxley. Section X. Microsauria, Dawson. Genera: _Dendrerpeton_, Owen; _Hylonomus_, Dawson; _Hylerpeton_, Owen. The schemes of classification used for the next 10 years did not depart in any appreciable degree from those already given. In 1875 Cope, in his Check-list of North American Batrachia and Reptilia (120), with a systematic list of the higher groups, published the following classification as being "adopted provisionally by the Smithsonian Institution":