ABSTRACT
In South Africa Xenopus laevis lives in practically any kind and amount of water. Its amazing abilities of overland migration are well known, and make it improbable that there should be differences between local races. Spawning can be induced in Xenopus laevis by injection of gonadotropic hormones, e.g. human gonadotropic pregnancy urine extract. Injection is made into the dorsal lymph sac, piercing the skin of the thigh and the septum between the lymph sacs of the thigh and the back. After spawning, which may last up to 24 hours, the adults are taken out, their excrements are removed and the temperature of the water is kept at 20—25° C. It is recommended to keep the animals in running water, the contents of the container being renewed at least once in 24 hours.
