FIGURE 3 in Convolutidae (Acoela) from the Andaman Sea

FIGURE 3. Amphiscolops potocani sp. nov.; photomicrographs of sagittal histological sections stained with hematoxylin. A. Section through length of body. B. Section through opening of frontal organ. C. Section through ovary. Note zoochlorellae within the epidermis, appearing as small dots with dark core. D. Section through male copulatory organ. Note outer longitudinal and inner circular muscles on ventral side of penis. Black arrows point to the distal part of gland cells, white arrowheads to nuclei at the distal part of the penis, black arrowhead to dark gland cells posterior to the statocyst, double-arrowhead to layer of fluid-filled vacuoles below the terminal web.