These anomalous forms may be called living fossils; they have endured to the present day, from having inhabited a confined area, and from having been exposed to less varied, and therefore less severe, competition.
这些异常形式可以称为活化石;他们一直忍受到今天, 因为他们居住在一个狭窄的区域,并且接触到的竞争较少, 因此竞争也不那么激烈。