This earthworm, which is an inhabitant of Ceylon, is 28 inches in length, and consists of about 260 segments. The setæ, instead of being arranged in continuous lines round the body as in Perichœta, fail for a short space both dorsally and ventrally. This peculiarity serves to distinguish the genus Pleurochœta from other Oligochœta. The intestine is provided with two sets of specialised glands; the anterior, occupying from segments twenty-two to forty-four, consists of a double series of deeply excavated dorsal pouches on the wall of the intestine, provided with a large development of glandular epithelium; the posterior glands are solid and kidney-shaped, about the size of a grain of wheat. They lie on the dorsal surface of intestine, occupying from the eighty-fifth to the one hundred and first segments; in all, fifteen pairs. They open into intestine by ducts.