We may, however, according to M. Jourdain, descend even a step lower and find aggregates of pigment-cells, apparently serving as organs of vision, without any nerves, and resting merely on sarcodic tissue.
Baina, Jourdain jaunaren arabera, maila bat beheragora ere jaits gaitezke eta pigmentu-zelula erantsiak aurki ikusmen-organotzat balio dutela diruditenak, inolako nerbiorik gabe, eta ehun sarkodikoaren gainean soilik daudenak.