Habitat and material. By the courtesy of Prof. W. M. Tattersall of University College, Cardiff, I have been able to examine what proved to be a new species of Chondracanthus, the material consisting of a female with a male attached anterior to the abdomen as is usual. The host, Malacocephalus laevis, was taken in deep water from S.W. Ireland by the fishing fleet of M. H. Neale, Esq., the eminent Cardiff naturalist, after whom this species is named.