The pinoteras is so called, from watching the fish called pina or the nacre, and in shape resembles a crab; and cohabiting with the nacre, he sits like a porter at his shell-side, which he lets continually to stand wide open until he spies some small fishes gotten within it, such as they are wont to take for their food. Then entering the shell, he nips the flesh of the nacre, to give him notice to shut his shell; which being done, they feed together within the fortification upon the common prey. The sponge is governed by a certain little creature more like a spider than a crab. For the sponge wants neither soul nor sense nor blood; but growing to the stones, as many other things do, it has a peculiar motion from itself and to itself, which nevertheless stands in need as it were of a monitor or instructor. For being otherwise of a substance loose and open, and full of holes and hollowness, by reason of the sloth and stupidity of it the sponge-watcher assists to give notice when any thing of food enters the cavities of it, at which time the sponge contracts itself and falls to feeding. But if a man approach and touch it, being nipped and admonished by the sponge-watcher, it seems to shudder and shut up the body of it, closing and condensing it in such a manner as makes it no easy thing to cut it from the place where it grows. The purple shell-fish also, called porphyrae, clustering together in a kind of mutual society, build up little combs for themselves like bees, wherein they are said to generate; and culling out the choicest substance of the moss and seaweed that stick to their shells, they seem to be in a circular commons among themselves, feeding the one upon the other’s nourishment.