35 



P9 



If «.%;-vv •■•■■■•. 



Figure 30: Metamorphosis of the pediveliger of Mytilus edulis L. (from Bayne, 1971). 



A — degeneration of velum; B — formation of oral lobes; aa — anterior adductor; 



ap — apical plate; eg — cerebral ganglion; es — esophagus; f — foot; lo! — lower oral lobe; 



pg — pedal ganglion; phc — phagocytized cells; uol — upper oral lobe; v — velum. 



