| Bipalium fuscolineatum | July 1886 | | | "A few representatives of this new species were caught by the late Professor Ijima in July, 1886, on the stone wall or under stones in Nikko." |
| Perocephalus fulvus | July 1886 | | | "Only a single specimen representing this new species was procured by the late Professor Ijima in July, 1886, on the stone wall covered with the moss in Nikko." |
| Rhynchodemus ijimai | July, 1886 | | | Some specimens representing this new species were obtained by the late Professor Ijima in July, 1886, on the mossy stone wall under stones in Nikko and its vicinity." |
| Microplana ruteocephala | July, 1886 | | | "Three representatives of this new species were captured by the late Professor Ijima in July, 1886, in Nikko." |