- 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.