The award is for meritorious work in zoology or paleontology published in a three- to five-year period and was established through the Daniel Giraud Elliot Fund by gift of Miss Margaret Henderson Elliot.
From Kevin Padian’s post to the Vertpaleo List:
“Jenny is the first vertebrate paleontologist (or, in her case, palaeontologist) since Al Romer in 1956 to have been awarded the medal, only the second female to have been awarded it (the other being Libby Hyman in 1951), and the first British awardee since D'Arcy Thompson”.