Unfortunately our knowledge of the exact distribution of bryophytes in Japanese Archipelago is very slight. It is my desire to publish the detailed distribution-maps for noteworthy Japanese species of Bryophytes. This study was undertaken in 1922 and has been coutinued up to the present day. In this paper the ranges of two species of Trichocoleopsis are treated. 1 Trichocoleopsis bissett (MITT) HHORIK. At present, Tr. bisseti is known from 25 localities, viz. 11 in Honshiu, 11 in Shikoku and 3 in Kiushiu respectively. So fas as the present state of my knowledge is concerned, this plant has its northern limit in Mt. Iwate (39°52'L.N.) of Honshiu and its southern limit in the Island of Yakushima (30°17'L.N.). As will be seen from the map 1 the centre of distribution lies in Shikoku. Area geogr. Japan (Honshiu, Shikoku, Kiushiu). 2 Trichocolepsis sacculata (MITT.) S. OKAM. At present Tr. sacculata is known from 76 localities, viz. 48 in Honshiu, 17 in Shikoku, 9 in Kiushiu and 2 in Corea respectively. So far as the present state of my exploration is concerned, this plant has its northern limit in Mt. Hakkoda (40°39'L.N.) of Honshiu and its southern limit in the Island of Yakushima (30°17'L.N.). As will be seen from the map 2 the centre of distribution lies in the middle-south district of Honshiu.
