. Annual report for the year ended June 30 .... United States National Museum. 4m. '?-^tS'M^- In this exhibit, added to the hall of fossil fishes, the lower Permian flesh-eater Dimetrodon is attacking Edaphosaurus, a primitive mam- mal-like reptile that lived some 220 million years ago in the Texas area. corals, snails, clams, trilobites, and other ancient shelled creatures. A case of ''Giants of the Past,'' displaying some of the largest known invertebrate fossils, is of special interest. The fourth alcove comprises a series of dioramas depicting ancient sea bottoms for each of the Paleozoic
. Annual report for the year ended June 30 .... United States National Museum. 4m. '?-^tS'M^- In this exhibit, added to the hall of fossil fishes, the lower Permian flesh-eater Dimetrodon is attacking Edaphosaurus, a primitive mam- mal-like reptile that lived some 220 million years ago in the Texas area. corals, snails, clams, trilobites, and other ancient shelled creatures. A case of ''Giants of the Past,'' displaying some of the largest known invertebrate fossils, is of special interest. The fourth alcove comprises a series of dioramas depicting ancient sea bottoms for each of the Paleozoic systems and for the Cretaceous of the Mesozoic, with their colorful forms reconstructed to appear as they were in life. The diorama of the Pennsylvanian system is the only one of its kind, depicting a marine environment rather than the coal swamp environ- ment portrayed in reconstructions in many other museums. This hall was developed under the scientific supervision of curator G. Arthur Cooper with the assistance of exhibits designer Gorman Bond. The hall of fossil fishes had been informally reopened in June 1960. However, a life-sized group, completed this year, showing a conflict be- tween two kinds of pelycosaurs, or fin-backed reptiles, as it might have happened about 260 million years ago, adds interest to this hall. The third hall, the age of mammals in Xorth America, is divided into five general areas, one for each of the epochs of Tertiary time from 17. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum. [Washington] : Smithsonian Institution
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