Introduction begins: At the request of Mr. Kiujiro Susaki, an assistant expert of the Forest Experiment Station, General Government of Chosen, I identified a number of earthworms which were collected by him for the purpose of his ecological study, from Koryo (N. L. 87" 45'), Keiki-do, about 30 km distant from Keijo, Korea. The collection ground is a woodland about 300 m in mean altitude and collections were made four times, once in each respective month, April, July, September and November, 1934. The entire collections were found to be represented by the 11 forms indicated in the following list ;
(1) Drawida nemora, n. sp.
(2) Pheretima (Ph.) hilgendorfi. (Michaelsen)
(3) Pheretima (Ph.) koryoensis, n. sp.
( 4) Pheretima (Ph.) fibula, n. sp. var. typica, n. var. (5) var. ranunculus, n. var.
(6) Pheretima (Ph.) serrata, n. sp.
(7) Pheretima (Ph.) monstrifera, n. sp.
(8) Pheretima (Ph.) susakii, n. sp. var. typica, n. var. (9) var. patina, n. var.
(10) Pheretima (Ph.) vallis, n. sp.
(11) Pheretima (Ph.) bitheca, n. sp.
(12) Allolobophora japonica Michaelsen?
(13) Eisenia rosea (Savigny)
(14) Bimastus sp.