1. Acanthochitona fascicularis. 49mm long. Mantle cavity paler than girdle. Gills, visible on left of animal, occupy only rear half of cavity; “merobranch” arrangement. Mouth for grazing algae, stained green, occupies most of head. July 2012. Split, Croatia
2. Acanthochitona fascicularis. 49mm long. Mantle cavity paler than girdle. Gills, visible on left of animal, occupy only rear half of cavity; “merobranch” arrangement. Mouth for grazing algae, stained green, occupies most of head. July 2012. Split, Croatia

Acanthochitona fascicularis. 49mm long. Mantle cavity paler than girdle. Gills, visible on left of animal, occupy only rear half of cavity; “merobranch” arrangement. Mouth for grazing algae, stained green, occupies most of head. July 2012. Split, Croatia