1) Measuring the sizes the guard cells of stomata and the epidermal cells in the remains of Metasequoia and Sequioa which are found in Japan in the strata since Tertiary, I could know that they were nearly the same as those of Metasequoia that now grows. in China or Sequoia that in California. 2) It is a well-known fact that there is a polyploidy relation between the sizes guard, cells of stomata and the epidermal cells and those of the plants in their intimate relations. Chromosome of Metasequoia measure as 2n=22. Chromosome of Sequoia measure as 2n=66. So I inferred that the Chromosomes of the remains must be the same as these. 3) The epidermis of Metasequoia has a waved shape like living species and is clearly distinguished from the straight shape of Sequoia, this is very useful for the discrimination of the two or another genera. 4) Metasequoia dicovered at Tokiguti (Prov. Mineo, Japan) was only the cone of Metasequoia japonica MIKI.(1941), and as the leaves of it are small, it seems that they both belong to the same species, Metasequoia japonica.
1) I investigated the quantitative method analysing vegetation according to the theory of small samples. 2) It is recognized by most investigators that we ought to use the random sampling in our field survey, but we often based its method on subjective randomizaton. 3) Sampling error is controlled by vegetational homogeneity and sampling ratio. And I could not compare several sampling methods by means of sampling error. 4) The best stratification is the worst clusterization. Those order is expressed by coefficient of interclass correlation (ρ') and also the quality of sampling method is decided by the coefficient. 5) The stratification by means of a dominant does not coincide with the one by means of the whole physiognomy.The latter is better. 6) The significance of difference between several sampling methods is indicated by analysis of variance.Relative number of sampling units required for a given accuracy according to samling methods is calculated from average comparable variance.
The writer investigated actually and studied synoecologically, about a year up to March 1950, the societies of epiphytic Lichens in the forests of the Shiia Sieboldi-Bladhia japonica and the Machilus Thunbergii-Rumohra aristata association (warm temperate forests) on the southern part of Idu Peninsula and in those of the Fagus crenata-Sasamorpha purpurascens association (temperate forests) and the Abies Veichii, the Abies Mariesii and the Tsuga diversifolia consociation (subalpine forests) on the Titibu mountainous region in the Saitama Prefecture and in those of the Faguscrenata-Sasa kulirensis association (temperate forests) on the Iide mountainous region in the Hukusima Prefecture. Carrying out the synoecological studies on the societies of epiphytic Lichens, he grouped the epiphytic lichens, from the viewpoint of physiognomy, into the following 12 life-forms for the first time (see the text figure), taking chiefly their external appearances and the conditions of attachment into consideration.