Education
  • Ph.D., Johns Hopkins University, Baltimore, Maryland, U.S.A., 1897
  • A.B., Amherst College, Amherst, Massachusetts, U.S.A., 1892

Dr. Clark was an American zoologist. He published on a variety of organisms, but his most notable work was on echinoderms.

Excerpt from Australian Dictionary of Biography on Dr. Clark:

"He (Dr. Clark) made his first expedition to Australia in 1913, collecting and later classifying all classes of sea-stars and their relations, and the Carnegie Institute published his book, The Echinoderm Fauna of Torres Strait (No.214, Washington, 1921); he believed that its coloured plates, prepared by E. M. Gosse of Sydney, were unequalled. Clark returned in 1929 and 1932, visiting major museums and collecting on the north-western coast, especially at Darwin and Broome. His wife Frances Lee, née Snell, whom he had married in 1899, often accompanied him on these field trips and illustrated his research papers. In 1938 the Museum of Comparative Zoology published his Echinoderms from Australia as No.55 of its Memoirs. The climax to his work was The Echinoderm Fauna of Australia (Carnegie Inst., No.566, Washington, 1946) which recorded all known species (including fossils) and discussed the origins and composition of the fauna in relation to adjacent areas. Next year the Royal Society of New South Wales awarded him the (W.B.) Clarke Memorial Medal 'in recognition of his distinguished contributions to natural science, particularly in regard to the elucidation of Echinodermata of Australia."

Relevant to the biota of the Gulf of Mexico, Dr. Clark has published the following:

Clark, H. L. 1915. Catalogue of Recent Ophiurans; based on the collection of Museum of Comparative Zoology. Memoirs of the Museum of Comparative Zoology 25(4): 165–376.

Clark, H. L. 1917. Hawaiian and other Pacific Echini. The Echinoneidae, Nucleolitidae, Urechinidae, Echinocorythidae, Calymnidae, Pourtalesiidae, Palaeostomatidae, Aeropsidae, Palaeopneustidae, Hemiasteridae, and Spatangidae. Memoirs of the Museum of Comparative Zoology at Harvard College 46(2): 85–283.

Clark, H. L. 1918. Brittlestars, new and old. Bulletin of the Museum of Comparative Zoölogy at Harvard College 62: 265–338.

Clark, H. L. 1939. Two new ophiurans from the Smithsonian – Hartford Expedition, 1937. Proceedings of the U. S. National Museum 86: 415–418.

Clark, H. L. 1941. Reports on the scientific results of the Atlantis Expedition to the West Indies, under the joint auspices of the University of Havana and Harvard University. The echinoderms(other than holothurians). Memorias de la Sociedad Cubana de Historia Natural Felipe Poey 15(1): 1–154.