The Common Frog Rana temporaria

The oocytes, embryos, and larvae of Rana temporaria have long been traditional subjects of diverse experimental embryological studies. Experimental embryologists have often used the embryos of R. temporaria for studies concerning the mechanisms of development. In the first half of this century experiments were carried out on eggs collected from natural spawnings. Among many works, one should mention those of Durken [11], Hamburger [14,15], and the founder of the school of experimental embryologists in the Soviet Union, Professor D. P. Filatov [12] and his numerous associates [8, 20, 19, 27, 32].