关于爬行类、鸟类蛋壳解剖结构的比较及蛋壳进化探讨

A Initial Reseach on the Eggshell's Anatomical Character of the Reptile and Birds

本文用特殊的解剖学的方法对爬行类中的代表动物甲鱼蛋壳、鸟类的代表动物家鸡蛋壳进行实验研究认为爬行类蛋壳由三层组成,石灰质脉络层是它特有的,在蛋壳上除有气孔外还有贯穿蛋壳的水(汽)孔。鸟类蛋壳由四层组成,石灰质结晶A层由爬行动物的石灰质脉络层进化而来。这为爬行类直接进化成鸟类提供了一个新的佐证。

Eggshell of the reptile is made up of three layers,among which the calcareous netted veins are its characteristic structure.On eggshell,besides pores,there are fine water(vapor)-holes passing through the shell.Eggshell of birds is made up of four layers,among which calcareous crystals layer A just evolved from the calcareous netted veins.This fact supplies new substantial evidence for the theory" the reptile evolved direct into birds".