These two crura are joined together through the commissura hippocampalis.

Labial commissure of mouth (commissura labiorum oris)

Anterior commissure of labia majora (commissura labiorum anterior)

The lateral palpebral commissure (commissura palpebrarum lateralis; external canthus) is more acute than the medial, and the eyelids here lie in close contact with the bulb of the eye.

The medial palpebral commissure (commissura palpebrarum medialis; internal canthus) is prolonged for a short distance toward the nose, and the two eyelids are separated by a triangular space, the lacus lacrimalis.