Following the technic utilized by Crafts in his work on. the storage tissue of potato tubers (Solanum tuberosum L.), it was possible to demonstrate the occurrence of plasmodesmata in cell walls of the endosperm tissue of Coffea arabica L. var. typica Cramer. These plasmodesmata appear more abundantly in the "primary pit fields" of the cell walls, and were found to be very different from those which occur in the potato tuber cells ; their shape, size, and number are very similar to the plasmodesmata reported for the endosperm cells of Diospyros kaki L. by Quisumbing.