The ultrastructure of glia-like cells in lateral nerve cords of adult Amphilina foliacea (Amphilinida).

The ultrastructure of main lateral nerve cords (MCs) of adult A. foliacea was studied. By examination of the serial sections it has been found that some glia-like cells are located on a periphery of MC. The processes of glia-like cells surround MCs and penetrate into the cord and surround the group of adjacent axons and pairs of neurones. There is a fine extracellular matrix between processes of glia-like cells. The numerous tight junctions occur between processes. The difference between the perykaryon's cytoplasm of glia-like cells in anterior, posterior and central part of MCs was found.