THE FINE STRUCTURE OF THE CONNECTIONS BETWEEN MUSCLE CELLS IN ASCIDIAN TADPOLE LARVA

Abstract

The myofibrils of the muscle bands of the tail of ascidian tadpole larvae, which appear to be continuous from cell to cell by ordinary light or phase optics, exhibit intercellular junctures in electron micrographs. The junctures contain moderately dense material within the potential intercellular space. The submicroscopic basis for functional continuity across the junctional complexes requires further elucidation.