M. Is. Geoffroy St. Hilaire has forcibly remarked that certain malconformations frequently, and that others rarely, coexist without our being able to assign any reason.

杰弗里·圣伊莱尔 (Geoffroy St. Hilaire) 曾有力地指出， 某些畸形经常发生，而另一些则很少发生， 我们无法找出任何原因。