The slab is No. 5 of the University of Kansas Museum of Natural History, collected in 1873 by Professor B. F. Mudge at Osage, Kansas, and presented by him to the museum in 1875.
The following list of Carboniferous amphibian (?) footprints is compiled from Hay's Catalogue of Fossil Vertebrates of North America. It is given here for the sake of completeness. Three types of amphibian footprints are described in the body of this work and they constitute the kind of material which an ichnologist has for the basis of his conclusions. The material is not very satisfactory for the morphologist, though much can be determined as to the foot structure.
| Genus and species. | Author. | Horizon. | Locality. |
| Allopus littoralis | Marsh | CM | Osage County, KS. |
| Anomæpus ? culbertsonii | King | " | Pennsylvania. |
| —— gallinuloides | King | " | " |
| Anthracopus ellangowensis | Leidy | " | " |
| Baropus lentus | Marsh | " | Osage County, KS. |
| Batrachichnus plainvillensis | Woodworth | " | Massachusetts. |
| Cheirotherium ? heterodactylum | ..... | " | Pennsylvania. |
| —— reiteri | Moore | " | " |
| Collettosaurus indianænsis | Cox | " | Indiana. |
| Crucipes parvus | Butts | " | Missouri. |
| Dromopus agilis | Marsh | " | Osage County, KS. |
| Hylopus caudifer | Dawson | " | Nova Scotia. |
| —— hardingi | Dawson | " | " |
| —— logani | Dawson | " | " |
| —— minor | Dawson | " | " |
| —— trifidus | Dawson | " | " |
| —— sp. indet | ..... | " | " |
| Limnopus vagus | Marsh | " | Osage County, KS. |
| Nanopus candatus | Marsh | " | " |
| Notalacerta missouriensis | Butts | " | Missouri. |
| Notamphibia magna | Butts | " | " |
| Palæosauropus antiquior | Dawson | SC | Nova Scotia. |
| —— primævus | Lea | CM | Pennsylvania. |
| —— sydenensis | Dawson | " | Cape Breton Isl. |
| —— unguifer | Dawson | Cmg | Nova Scotia. |
| Thenaropus leplodactylus | King | CM | Pennsylvania. |
| —— ovoidactylus | King | " | " |
| —— pachydactylus | King | " | " |
| —— sphærodactylus | King | " | " |
| Horizon abbreviations | CM = Coal Measures. SC = Subcarboniferous. Cmg = Carboniferous (millstone grit). | ||
[BIBLIOGRAPHY OF THE FOSSIL AMPHIBIA, WITH ESPECIAL REFERENCE TO THE AMPHIBIA FROM THE COAL MEASURES OF NORTH AMERICA.]
The following literature list, containing more than six hundred titles (1824-1916), is believed to be fairly complete. It certainly includes all of the important contributions to the subject of the fossil Amphibia. A few brief bibliographies of fossil Amphibia have appeared from time to time, in special memoirs on various faunas, such as: Broili ([58]), Schwarz ([541]), Fraas ([242]), von Ammon ([7]), and Case ([98]). None of these have attempted a complete survey of the field. The references given below have all, or nearly all, been compiled from the original sources and every effort has been made to have them complete and accurate.
1. Abel, O. 1912. Grundzüge der Paleobiologie der Wirbelthiere. 211-220, figs. 144-150.
2. Agassiz, L. 1862. Highly interesting discovery of new Sauroid remains. Amer. Jour. Sci. and Arts, Jan., XXXIII, 138.
3. Alberti, Fr. v. 1834. Beitrag zu einer Monographic des bunten Sandsteins, Muschelkalks und Keuper.