26 
Donald Baird and John R. Horner 
So far as we can determine the name Coelosaurus [Owen] does not ap- 
pear in the literature either before or after the 1854 publication cited. Its 
author evidently abandoned it — not surprisingly, as it was based on a 
mutilated vertebral centrum of indeterminate age that had been 
redeposited in Pleistocene drift — for he made no allusion to it in his sub- 
sequent studies on British fossil reptiles. Coelosaurus [Owen] is not listed 
in the standard nomenclators of Neave, Sherborn, and Schulze- 
Kukenthal, nor in the indexed bibliographies of vertebrate paleontology 
compiled by Hay, Camp, and Gregory. We came across it entirely by ac- 
cident. As a nomen oblitum it deserves oblivion in taxonomy although it 
remains valid for purposes of homonymy. 
ACKNOWLEDGMENTS . — For institutional courtesies and the loan of 
specimens we are pleasantly indebted to Ms. L. Gay Vostreys of the 
Academy of Natural Sciences of Philadelphia, Dr. Eugene S. Gaffney of 
the American Museum of Natural History, Dr. Walter H. Wheeler of the 
University of North Carolina at Chapel Hill, and Dr. Nicholas Hotton III 
and Mr. Robert W. Purdy of the National Museum of Natural History, 
Smithsonian Institution. Advice and criticism have been generously 
provided by Messrs. Michael K. Brett-Surman and Gerard R. Case, and 
Drs. John E. Cooper, Wann Langston, Jr., John S. McIntosh, Halsey W. 
Miller, Jr., Clayton E. Ray, and Frank C. Whitmore, Jr. Our research 
was supported by the William Berryman Scott Fund of Princeton 
University. 
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Brett, C. Everett, and W. H. Wheeler. 1961. A biostratigraphic evaluation of the 
Snow Hill Member, Upper Cretaceous of North Carolina. Southeast. Geol 
5(2):49-132, pi. 1-9. 
Brett-Surman, Michael K. 1976. The appendicular anatomy of hadrosaurian 
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