The province of Nemuro, which is situated in the eastern end of Hokkaido, has several hot springs in its mountainous part of the area. It is believed that all of the springs- Rausu, Kawakita, Yorousi and Pausibetu- belong to muriated springs. the writer studied the thermal flora of these hot springs in the last summer, August 1940, and collected 68 tubes of materials. In this survery 34 species and varieties of thermal algae are observed. they are 23 Cyanophyceae, 8 Bacillariophyceae, and 2 Chlorophyceae. All of these thermal algae are given in a table. the Rausu Hot Spring has the water temperature of 99 ℃ and a pH of 8.4 at one of its vents. the vegetation, however, flourishes at temperature 24-58.4 ℃ and at pH 8.0-8.2. here 14 species of Cyanophyceae, I Chlorophyceae and 3 Bacillariophyceae are found. Among them, Synechococcus elongatus var. amphigranulatus, Phormidium fragile and Ph. laminosum are most abundantly developed. In the Kawakita Hot spring, the water temperature-range in which the thermal algae grow, is 30-42℃ and pH 6.3-7.1. here 7 specias of Cyanophycase, I Chlorophyceae and 5 Bacillariophyceee are observed. the abundant occurrance of Microcystis flos-aquae is a noticeable phenomenon. Cyanidium caldarium is also found in a water of pH 6.9. Bacillariophyceae are fairly abundant. In the Yorousi Hot Spring, the water temperature-range is 31.3-62.6℃ and its pH 7.1-7.8. the Cyanophycean algae are dominant. Besides 10 species of Cyanophyceae, only one diatom is found. In the Pausibeti Hot Spring the water temperature-range is 44.8-59℃ and its pH 7.1-7.8. 9 species of Cyanophyceae and I of Bacillariophyceae are found. In general, the thermal vegetation of this spring is much alike to that of the preceeding spring. Six species of algae are to be newly added to the japanese thermal flora. they are as follows : microcystis flos-aquae, Synechococcus eximius, Calothrix fusca, Ulothrix variabilis, Achnanthes linearis and Lyngbya nemuroensis. The last named is described as new to science.

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43. 臺灣のクラマゴケは,小泉教授が指摘せられたやうに内地のクラマゴケ Selaginella remotifolia SPRING var. japonica (MIQ) KOIDZ. とは異り,その背葉の先端が鋭尖形である.これがスマトラ,ジャバ,ニューギネア,フィリッピン,支那等に廣く分布してゐる S. remotifolia SPRING そのものである.新和名をニセクラマゴケとした. 44. ニヒタカカタヒバ(早田) Selaginella morrisonensis HAYATA は支那の Selaginella Labordei HIERON. と同種である.臺灣では2000米前後の山地に多く,やや濕つた所に生ずるカタヒバ型の柔な美しい種類である. 45. 臺灣産のホソバカタヒバ(早田) の學名 Selaginella stenostachya HAYATA (1914年) はそれより早く發表された同名 S. stenostachya WARB. (1900年) があるので,佐竹義輔博士は S. Hayatana SATAKE (1934年) と新學名を定められたが,これにも亦それより早い同名 S. Hayatana KUMM. (1927年) があるので,小泉教授は S. Satakeana KOIDZ. (1936年) と學名を變更せられた.しかしこのホソバカタヒバは既に1900年に WARBURG が發表した臺灣産の Selaginella Wichurae WARB. と同種である.コケカタヒバ S. leptophylla BAK. によく似てゐるが,背側にあたる苞葉が短くて1粍ばかりしかないから胞子嚢穗の幅は1.5粍ぐらいしかない.佐々木舜一氏はホソバカタヒバとコケカタヒバとは同種であるとせられたし,英國の ALSTON も亦 S. Wichurae WARB. をその異名にしてゐる.兩氏の處置は正しいものと思はれるが,この二種は胞子嚢穗の幅の廣い狹いでとにかく區別することができるから,ホソバカタヒバをコケカタヒバの變種にして,その學名を Selaginella leptophylla BAK. var. Wichurae (WARB.) TAGAWA と變更した.

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