Section Ii. Aplysioidea.--Shell Small, Usually Not Spiral, Sometimes

absent, no cephalic disc, head prominent, with two pairs of tentacles, epipodia large, more or less reflected.

FAM. Aplysiidae.--Characters those of the section. Genera: Aplysia (Fig. 287 D), shell arched, flattened, animal large (the “sea hare”); Dolabella, shell subtriangular (Fig. 286 F); Dolabrifer, shell sub-quadrangular, not spiral; Notarchus, shell microscopic, spiral; Phyllaplysia, body very depressed, oval, no shell.