1958 年 71 巻 841-842 号 p. 242-245
1. The mucilage which surrounds the egg of Coccophora Langsdorfii is stained with Congo red, with ruthenium red, and with ferric chloride preceded by treatment with tannic acid.
2. The mucilage is composed of the inner membrane, the middle layer, and the outer mucilage. The inner membrane has a number of small pits. The middle layer consists of many sublayers. The outer mucilage cannot be stained with any of the above agents.
3. The axle of the mucilaginous stalk is stained red, and its surrounding zone deep blue-violet with Congo red. This reveals a positional relation between the egg and the stalk. It is known that the form of the elongated egg is controlled by the pressure, perpendicular to the stalk, of the inner membrane, so that the polarity axis of such eggs is determined parallel with the stalk.