... 'water-fleas' andbarnacles, pass through far more strikingchanges than its higher groups, such aslobsters and woodlice. But among the Insects, a class of predominantlyterrestrial and aerial ... cuttlefish, and a spider affordwell-known examples of this rule. Land-animals, generally, produce young whichare miniature copies of themselves, forexample horses, dogs, and other mammals,snails and ... scorpions andearthworms. On the other hand,metamorphosis among animals isassociated with eggs of small size, withaquatic habit, and with relatively lowzoological rank. The young of a starfish,for...