| Activity | Clark's career took an unexpected turn when as a young man he lost his hearing after coming down with yellow fever during a field expedition. Teaching becoming difficult, he re-oriented himself toward museum work and made a considerable success for himself as the curator of echinoderms at the Museum of Comparative Zoology, Harvard. Clark was an all-around zoologist; in addition to publishing over one hundred papers on echinoderms, he also wrote on a variety of aspects of the natural history of birds, reptiles and amphibians, and spent considerable time in the field in Australia, Jamaica, Japan, Tobago, Bermuda, and the Galapagos Islands.
1899 - 1905 was professor of biology at Olivet College before being hired as an Assistant at the Museum of Comparative Zoology, Harvard University. 1910 - 1927 he was curator of echinoderms, 1927 curator of invertebrates and associate professor. He was also an associate professor at Stanford University 1936. From 1946-7 he was a research associate for the Allan Hancock Foundation, Los Angeles and in 1947 he received the W.B. Clarke Memorial Medal from the Royal Society of New South Wales. |