著者

梁瀬 健 阪本 佐登美

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.74, no.7, pp.238-242, 1965-07

被引用文献数

2

---

The retina of the dorsal eye consists essentially of a single visual cell layer with nervous process. In each visual cell the proximal and distal segments seem to be distinguishable. A distal segment corresponding to the outer segment of the rod contains several laminar cores (ellipsoidal or spherical in shape). Each laminar core has a granule-rich body at the center and joins to the cytoplasm of the proximal segment through a connecting piece. A cilium-like structure consisting of nine peripheral double tubules runs through a connecting piece. The proximal segment contains numerous mitochondria, a paranucleus and a nucleus. The important fact is that these structures are fundamental for the photoreceptors not only in vertebrates but also in molluscs.