_Eoserpeton tenuicorne_ Cope, Linton, Ohio. Family _Amphibamidæ_ Moodie. _Amphibamus grandiceps_ Cope, Mazon Creek. _Amphibamus thoracatus_ Moodie, Mazon Creek. _Cephalerpeton ventriarmatum_ Moodie, Mazon Creek. Family _Nyraniidæ_ Lydekker, 1889. _Ichthyerpeton squamosum_ Moodie. Linton, Ohio. _Cercariomorphus parvisquamis_ Cope, Linton, Ohio. Family _Ptyoniidæ_ Cope, 1875. _Ptyonius nummifer_ Cope, Linton, Ohio. _Ptyonius marshii_ Cope, Linton, Ohio. _Ptyonius vinchellianus_ Cope, Linton, Ohio. _Ptyonius pectinatus_ Cope, Linton, Ohio. _Ptyonius serrula_ Cope, Linton, Ohio. _Œstocephalus remex_ Cope, Linton, Ohio. _Œstocephalus rectidens_ Cope, Linton, Ohio. _Thyrsidium fasciculare_ Cope, Linton, Ohio. Family _Ichthycanthidæ_ Moodie. _Ichthycanthus ohiensis_ Cope, Linton, Ohio. _Ichthycanthus platypus_ Cope, Linton, Ohio. Family _Molgophidæ_ Cope, 1875. _Molgophis macrurus_ Cope, Linton, Ohio. _Molgophis brevicostatus_ Cope, Linton, Ohio. _Molgophis wheatleyi_ Cope, Linton, Ohio. _Erpetobrachium mazonensis_ Moodie, Mazon Creek. _Pleuroptyx clavatus_ Cope, Linton, Ohio. _Phlegethontia linearis_ Cope, Linton, Ohio. _Phlegethontia serpens_ Cope, Linton, Ohio. Family _Sauropleuridæ_ Hay, 1902. _Sauropleura digitata_ Cope, Linton, Ohio. _Sauropleura newberryi_ Cope, Linton, Ohio. _Sauropleura scutellata_ Newberry, Linton, Ohio. _Sauropleura pauciradiata_ Cope, Linton, Ohio. _Sauropleura longidentata_ Moodie, Linton, Ohio. _Sauropleura foveata_ Cope, Linton, Ohio. _Sauropleura (Anisodexis) enchodus_ Cope, Linton, Ohio. _Sauropleura_ sp., Linton, Ohio. _Ctenerpeton alveolatum_ Cope, Linton, Ohio. _Saurerpeton latithorax_ Cope, Linton, Ohio. _Leptophractus obsoletus_ Cope, Linton, Ohio. _Leptophractus dentatus_ Moodie, Linton, Ohio. _Leptophractus lineolatus_ Cope, Linton, Ohio. Order Temnospondylia Zittel, 1887. Coal Measures and Permian. Family _Cricotidæ_ Cope, 1884. _Spondylerpeton spinatum_ Moodie, Mazon Creek, Ill. Family _Eryopidæ_ Cope, 1882. _Eryops_ sp. indet., Pitcairn, Pa. Family _Macrerpetidæ_ Moodie, 1909. _Macrerpeton huxleyi_ (Cope), Linton, Ohio. _Macrerpeton deani_ Moodie, Linton, Ohio. Family _Anthracosauridæ_ Cope, 1875. _Eosaurus acadianus_ Marsh, Nova Scotia. _Eobaphetes kansensis_ Moodie, Kansas. _Baphetes planiceps_ Owen, Nova Scotia. _Baphetes minor_ Dawson, Nova Scotia. _Dendrerpeton acadianum_ Owen, Nova Scotia. _Dendrerpeton oweni_ Dawson, Nova Scotia.