In 1909, he wrote the Crustacea section in Lankester's Treatise on Zoology, where he introduced the superorders Eucarida, Peracarida and Hoplocarida as well as the concept of the caridoid facies, a hypothetical ancestral malacostracan.
En 1909 escribiu a sección de crustáceos no Treatise on Zoology de Lankester, onde introduciu as superordes dos Eucarida, Peracarida e Hoplocarida, así como o concepto da facies caridoide, dun hipotético antepasado dos malacostráceos.