With the help of her father, Willcox gained a position in the zoology department at Wellesley College in Massachusetts. Her mother, however, regretted the decision since it meant "giving up all possibilities of marriage". Very little in the way of zoological course work had been developed at Wellesley to that point, and Willcox had the task of essentially building a zoology department from scratch. She introduced a number of innovative teaching methods. For a time, her department became one of the foremost in the country, attracting a number of women who would become productive zoologists. Her interest during this period was in
ornithology, and in 1895 she published
Pocket Guide to the Common Land Birds of New England. To improve her job security at Wellesley, in 1896 Willcox took a leave of absence to study for a Ph.D. at the
University of Zurich. In 1898 she was at the
Naples Zoological Station. She completed her degree program in 1898 with a dissertation
On the Anatomy of Acmaea fragilis (Chemnitz), and was allowed to return to her position at Wellesley as head of the department. Much of her research at the college was on comparative anatomy of
molluscs, a phylum of invertebrate animals, and of
Acmaeidae, a family of
sea snails. She authored a number of scientific papers in zoological publications. Her last paper, published in 1906, was on the anatomy of
Acmaea testudinalis. Willcox retired in 1910 as professor emeritus, supposedly as a result of poor health. The exact cause is unclear, but a 1928 letter mentioned
rheumatism. Following retirement she became active in the
League of Women Voters,
Federation of Women's Clubs,
National Audubon Society, and the
Boston Society of Natural History. She died at her home in
Pocasset, Massachusetts, some 43 years after her retirement. ==Bibliography==