. Revision of the Amphibia and Pisces of the Permian of North America. thyotomi, 157Ichthyodorulites, 161Janassa, 156J. strigilina, 156J. gurleyana, 156Lysorophidse, 66, 141Lysorophus, 68, 141L. tricarinatus, 60Megaliclithys, 168M. nitidus, 169M. ciceronius, 169Microsauria, 15, 85Otocoelidae, 57Otocoelus, 58 O. mimeticus, 59O. testudineus, 59Parioxys, 31P. ferricolus, 32, 104Platysomus, 173P. palmaris, 173Pleuracanthus, 157P. quadriseriatus, 158P. gracilis, 158Pyritocephalus, 173Rhachitomus division, 23Rhachitomus, 27Sagenodus, 163S. dialophus, 163S. fossatus, 163S. paucicristatus, 164S. perip
. Revision of the Amphibia and Pisces of the Permian of North America. thyotomi, 157Ichthyodorulites, 161Janassa, 156J. strigilina, 156J. gurleyana, 156Lysorophidse, 66, 141Lysorophus, 68, 141L. tricarinatus, 60Megaliclithys, 168M. nitidus, 169M. ciceronius, 169Microsauria, 15, 85Otocoelidae, 57Otocoelus, 58 O. mimeticus, 59O. testudineus, 59Parioxys, 31P. ferricolus, 32, 104Platysomus, 173P. palmaris, 173Pleuracanthus, 157P. quadriseriatus, 158P. gracilis, 158Pyritocephalus, 173Rhachitomus division, 23Rhachitomus, 27Sagenodus, 163S. dialophus, 163S. fossatus, 163S. paucicristatus, 164S. periprion, 165S. vinslovi, 165Selachii, 156Spermatodus, 172S. pustulosus, 172Sphserolepis, 170S. arctata, 171Stegocephalia, 15Temnospondyli, 23Tersomius, 51T. texensis, 51Trematopsidee, 66, 130Trematops, 67, 130T. milleri, 67, 130Trimerorhachidse, 38Trimerorhachis, 39, 106T. insignis, 41, 112T. bilobatus, 43T. conangulus, 44, 112T. leptorhynchus, 45T. mesops, 46, 112T. alleni, 47Urodela, 68Zatrachys, 47, 113Z. serratus, 48Z.^conchigerus, 50 179 CASE—AMPHIBIA AND PISCES. Diplocaulus limbatus. No. 4470 Am. Mus. X % 1. The Skull. 2, 3, 4. Dorsal vertebrae. 2, from side; 3, from above; 4, from below. CASE—AMPHIBIA AND PISCES PLATE 2
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