- tentacles originate above umbrella margin - gastric pouch (one is shaded in blue), not all Narcomedusae have them - peripheral canal (green), may be absent - otoporpae (red arrow) are ridges clasping the umbrella margin, formed by a thickening of the epidermis, may be absent, function is unknown - peronia are clefts between the lappets of the umbrella margin(blue arrow)
