Among the Invertebrates collected by Büttikofer and the late Sala during their journey in Liberia 2), I found two large earthworms, belonging to the genus Acanthodrilus). Though the specimens are not very well preserved, I will describe them as good as possible, our knowledge of this interesting genus of Lumbricidae being rather scanty and only based upon the examination of four species: A. obtusus Perr. and A. ungulatus Perr. from New-Caledonia, A. verticillatus Perr. from Madagascar 4) and A. kerguelenensis R. Lank. from Kerguelen Island 5).