A collection of Holothurians in the Leiden Museum from the East Indies and new Guinea, with the description of a new species of Protankyra (Holothurioidea: Synaptidae) from Java

Twenty-seven species of holothurian are recorded from the East Indies, including a new species in the synaptid genus Protankyra collected from the central north coast of Java. The majority of the species are widely distributed throughout the Indo-west Pacific region. However, Labidoplax incerta (Ludwig, 1875), known only from Java, is recorded for the second time from the same area.