ERNEST E. JUST (1883–1941) was a marine biologist. In 1909 Dr. Just began his research on the embryological resources of marine animals at the Marine Biological Laboratory at Woods Hole, Massachusetts. His study of the process of fertilization in marine invertebrates and of the fundamental role of the cell surface in the development of organisms made him a leading authority on marine biology. A professor of zoology, Dr. Just wrote extensively in his field. Two outstanding works are Basic Methods for Experiments on Eggs of Marine Animals and The Biology of the Cell Surface, both published in 1939.