The group known as the Agassiz Zoologists consisted of: Edward S. Morse (Dir. of Peabody Museum), Alpheus Hyatt, A.S. Packard, Jr. and F. W. Putnam. Many studied under the Harvard scientist and lecturer Louis Agassiz.
Louis Agassiz (May 28, 1807 – December 14, 1873) was a Swiss paleontologist, glaciologist, geologist and a prominent innovator in the study of the Earth's natural history. Harvard appointed him professor of zoology and geology, and he founded the Museum of Comparative Zoology there in 1859 serving as the museum's first director until his death in 1873.
The Salem based Agassiz Zoologists clashed with the Harvard teacher, as he resisted Darwin's theories of evolution, and they believed it worth studying.
They started the scientific journal American Naturalist.
The Impact of Evolutionary Theories on the Salem Group of Agassiz Zoologists (Morse, Hyatt, Packard, Putnam) Essex Institute Historical Collections, Vol. 115 (1979) p. 144-171
First Book of Zoology by E.S. Morse, 1888
Essex Institute Historical Collection "From Penikese to the Marine Biological Laboratory at Woods Hole- the Role of Agassiz students (Origin and History of the Anderson School of Natural History" Ralph W. Dexter, Vol. 110 (1974) p. 151