抄録
The Octopus Ocellatus belongs to the phylum mollusca, class cephalopoda, order octopoda, and lives in the sea around Japan. It has a pair of statocysts at the base of and dorsal to the siphon. The aim of this study is getting some good photographs of the statocyst with the otolith of a Octopus Ocellatus under the light microscope. Some Octopus Ocellatuses, which lived at a depth of about twenty meters in the Tokyo bay, were fished with line. While they were alive, they were fixed with 10% folmaldehyde solution diluted with seawater and dehydrated with ethylalcohol, distilled water and seawater. These specimens were embedded in celloidin. The sections were out 30 μm thick and stained with hematoxylin-eosin, then observed with the light microscope. As the result of this method, several fine pictures of the macula, crista, cupula, static sac and otolith in the statocyst were able to be gotton.
