两栖动物(蠑螈、鲵鱼)肢足或最常用的实验对象即蜥蜴肢足的迅速恢复,乃是形态学实验家所研究的纷繁过程中最令人感到奇异的现象。动物界中有许多生物具备有比这更高的恢复性能。例如池塘与湖泊中生长的一种奇异动物——水螅,很容易由只佔本身体躯五十分之一的细微部分恢复成为新的完整水螅,蚯蚓也是如此,当它被截成许多小段时,每一段都能重新形成为完整的蚯蚓。但这都是些构造比较简单的机体,是些处於动物低级发展阶段的生物。而蠑螈或蜥蜴却是脊椎动物,即与产 Amphibians (salamanders, mandarin fish) The rapid recovery of limbs or limbs, the most commonly used experimental subject, is the most bizarre phenomenon in the numerous processes studied by morphologists. There are many creatures in the animal world that have higher recovery performance than this. For example, a strange creature growing in ponds and lakes, the hydra, can easily be restored to a new, complete hydra by only one-fiftieth of its own body, as does earthworms. When it is cut into many small segments, Each section can be reformed into a complete earthworm. But these are some of the more simple structures of the body, are some animals in the lower stages of development of biological. The salamander or lizard is vertebrate, that is, and production