マルタニシ Radula の形態学的研究 : II 組織構造について

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A series of study on the histological pictures of the radula and tongue of Cipangopaludina malleate was summarized as follows. 1. The radula showed an entirely negative response to the color reaction for chitin, but showed strongly positive reaction to keratin staining by Martinotti. This is to say that the teeth were stained yellowish golden to suggest an eleidin composition through their entire length except the tip part which was stained light blue to suggest keratin composition. The basal membrane was stained purple suggesting keratohyalin composition. 2. In the capsule of radula of primary stage of development, the basal membrane was discriminated into the upper structureless layer and the lower layer of fibrous structure and another fibrous layer with bundled hair structure which emerged from the distal end of the basal cells. Such discrimination could not be observed on the dorsal part of radula of mature stage. 3. The basal cells of the radula were generally tall in height, columnar in shape and arranged in single aligment, each of them provided with an oval to near rounded nucleus within the cell body. The length of cell and localization of cell nucleus were not always uniform, but subject to change with different functional sites in which they were placed. 4. The tongue of Cipangopaludina malleata was consisted of a bulk of cartilaginous tissue of an elongated oval shape and small amount of muscle tissue.
1971-03-31