The results of the observation on the spermatoteleosis in Nitella sp. are reported and discussed. The blepharoplast is characterized by its coiled structure. The spiral structure of the blepharoplast can already be seen in the earlier stage of the spermatoteleosis, long before the coalescence between nucleus and blepharoplast takes place. Cilia, arising from the blepharoplast, lie imbedded in the cytoplasm and do not come into the groove till the degeneration of the cytoplasm is completed. In a fully mature spematozoid, three portions (blepharoplast, nuclear spiral and posterior part of cytoplasmic nature) are recognizable. Between the blepharoplast and the nucleus can be seen a plasma-band, which is presumably a product of the blepharplast itself. The spermatozoid shows a right-handed spiral.
1. The germination of the spore begins with the wedge-shaped rending of the spore-membrane 55-110 minutes after sowing in tap water (15°C). 2. In the protoplast which has just crept out of the spore membrane a granular body appears on the surface of the nucleus being connected with the nucleolus by a delicate filament. This granular body extends and contracts in the cytoplasm and elongates into a rod-like body (rhizoplast). In the developing process of the rod-like body a special cytoplasm differentciates around the rod-like body: this special cytoplasm becomes the basal cap in the later stage. The distal end of the rod-Like body is the basal body (blepharoplast) from which the flagellum develops secondarily. 3. The flagellum is completed 85-135 minutes after the germination of the spore and remains without change till conjugation or till the degeneration of the planocyte supervenes. 4. Though the nucleus is positive to FEULGEN's nucreal-reaction both the basal body and the nucleolus are negative to this reaction. This seems only natural, judging from the fact that the basal body originates in relation to the nucleolus. 5. The basal body is composed of two granules from one of which a flagellum develops, but sometimes two flagella develop from each of the two basal body granules. The flagellum is ca. 16μ in length, having no end-piece. In rare cases the planocyte has three flagella. 6. The length of the planocyte is ca. 15μ. In the anterior portion of the planocyte-body there is situated the nucleus in which a large nucleolus is seen. The basal cap is seen between the basal body and the nucleus. The rhizoplast connects the basal body to the nucleus. The connection between the proximal end of the rhizoplast and the nucleolus tends to become obscure in the completed planocyte.
1. The anatomical characteristics of the leaves of six species belonging to Sect. Atratae are described in the present paper. 2. The shapes of hinge cells are most peculiar in Carex Meyeriana and C. Augustinowiczii. Spine cells are always found in the margins except those of C. atrata, also in the upper epidermis in C. Meyeriana and C. Augustinowiczii. Stomata in the upper epidermis are found only in C. Gmelini. Protuberances are numerous in the under epidermis of these species, excepting C. Gmelini. Transfusion cells are evident in C. Meyeriana. 3. Those six species can be divided into three groups according to the characters of the leaves; i.e. C. Meyeriana and C. Augustinowiczii in the first, C. Gmelini in the second and the other three species in the third group.