Harry Wallis Kew (1868-1948) was an amateur English zoologist. Wallis Kew worked as a bank clerk in Kent who devoted his free time to the study of pseudoscorpions and molluscs. He is best remembered for his book entitled The dispersal of shells; an inquiry into the means of dispersal possessed by fresh-water and land Mollusc, which included a preface by Alfred Russel Wallace. In this work, Wallis Kew was tracking the phenomena that is now referred to as invasive species in relation to molluscs, and in particular the zebra mussel.