156
F .
Ε .
L E H M A N N
F I G . 1. Development of amputated tails of Xenopus larvae. Photographs of living
specimens, 20 days after amputation, (a) Normally formed tail tip of an untreated larva.
(6) T o t a l l y inhibited tail s t u m p after continuous treatment with Quinoxaline 3576 (Ciba)
at a concentration of 1:100,000. T h e concentration of the inhibitor is close to the limit
of toxicity. I n the s t u m p all axial organs and the dorsal fin are present. T h e histological
structure has remained normal. N o regeneration has taken place.
F .
Ε .
L E H M A N N
F I G . 1. Development of amputated tails of Xenopus larvae. Photographs of living
specimens, 20 days after amputation, (a) Normally formed tail tip of an untreated larva.
(6) T o t a l l y inhibited tail s t u m p after continuous treatment with Quinoxaline 3576 (Ciba)
at a concentration of 1:100,000. T h e concentration of the inhibitor is close to the limit
of toxicity. I n the s t u m p all axial organs and the dorsal fin are present. T h e histological
structure has remained normal. N o regeneration has taken place.