. Annual report for the year ended June 30 .... United States National Museum. INVESTIGATION AND RESEARCH 79 both large groups. Included are about 160 species. Head curator G. A. Cooper is describing the Productoidea, the largest single group in the collection. He has described about 60 species and has amassed over 400 pages of manuscript. The number of species described thus far by Cooper and Grant, 220 species, is estimated at not quite half the total represented in this prolific These fossil triassic amphibians, Buetfneria perfecfa, were probably trapped in a pool that dried up some
. Annual report for the year ended June 30 .... United States National Museum. INVESTIGATION AND RESEARCH 79 both large groups. Included are about 160 species. Head curator G. A. Cooper is describing the Productoidea, the largest single group in the collection. He has described about 60 species and has amassed over 400 pages of manuscript. The number of species described thus far by Cooper and Grant, 220 species, is estimated at not quite half the total represented in this prolific These fossil triassic amphibians, Buetfneria perfecfa, were probably trapped in a pool that dried up some 1 75 million years ago. In July, Drs. Cooper and Grant went to the Glass Mountains of Texas and there met Messrs. John Skinner and Garner Wilde of the Humble Oil Company, Drs. Charles and J. P. Ross from Yale Uni- versity, Mr. Richard Moyle from the University of Iowa, and others for a field conference on the stratigraphy of the Glass Mountains. About a week was spent in the region, primarily studying and arguing about difficult problems. Collections were made at a few new local- ities. After the conference Cooper and Grant visited a Permian locality in the Chinati Mountains and then went to Van Horn, Tex., where they were joined by Dr. Francis G. Stehli from the Pan American Petroleum Company. North of Van Horn the party collected fossils. 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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