. Biology in America. Biology. Above, James Dwight Dana Above, Joseph Leidy Below, Edward Drinker Cope Below, Othniel Charles Marsh Cuurtt'sy oj Dr. Qeo. P. Merrill. 41. 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 Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger

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