_Ptyonius vinchellianus_ Cope. Skull and anterior vertebræ. _Saurerpeton latithorax_ Cope. Skull and fore part of body. _Sauropleura digitata_ Cope. Greater part of body minus skull. _Sauropleura (Anisodexis) enchodus_ Cope. Part of jaw. _Sauropleura foveata_ Cope. A single interclavicle with impression. _Sauropleura longidentata_ Moodie. Incomplete skull with mandible. _Sauropleura newberryi_ Cope. Two incomplete skulls with vertebræ. _Sauropleura pauciradiata_ Cope. Elements of a pectoral arch. _Sauropleura scutellata_ Newberry. Imperfect skeleton. _Stegops divaricata_ Cope. Nearly complete skull. _Thyrsidium fasciculare_ Cope. Dorsal vertebræ. _Tuditanus brevirostris_ Cope. Skull and anterior vertebræ. _Tuditanus longipes_ Cope. Part of vertebral column with limbs. _Tuditanus punctulatus_ Cope. Skull and anterior part of body. _Tuditanus walcotti_ Moodie. Skull and portions of body. Besides the above-listed species there are others indicated by fragments too poorly preserved to be worthy of specific designation. The Linton Amphibia are all apparently confined exclusively to that locality. Species from the Cannelton slates have been assigned, however, to genera which occur at Linton, _i.e._, _Erpetosaurus_ and _Tuditanus_. This reference may be due to lack of knowledge, as the forms are insufficiently known. A single Linton species has been assigned to _Ichthyerpeton_, a genus known otherwise only from the Coal Measures of Kilkenny, Ireland. Cope referred species from Linton to the genus _Ceraterpeton_ of Huxley, from Kilkenny, Ireland, but Jaekel (347) and the writer (462) have shown that the species were incorrectly assigned to the genus _Ceraterpeton_, and that in fact they represent widely distinct genera. A single species has been identified by Eastman from the Des Moines limestone of Iowa as identical with one from Linton, _Pleuroptyx clavatus_ Cope. The Linton fauna is distinct from that of the Mazon Creek beds, and also from that of South Joggins, Nova Scotia. (_o_) The deposits in Nova Scotia have been correlated with the Coal Measures strata of the United States (Bell, Summ. Rpt. Geol. Surv. Canada, 1912, 1914, 360-371). They are very near the same age as the Linton beds and come in near the base of the Allegheny River series. The exposures are at the South Joggins, along the sea-coast. Here in strata of clay interstratified with coal are found the erect stumps of the Sigillariæ, and it was in the rock within these stumps that Lyell and Dawson, in 1853, discovered the remains of the amphibians which they termed "reptiles."