This paper deals with the early development of Bufo Viridis Laurenti
a common and quite abundant species of aruran in Xinjiang
According to the observations in May
1988 and in April and May
1989
the whole course of the embryonic devetopment in this species can be divided into 25 stages from fertilized egg to opercular completion. Under the thermostatic conditions of 20±1℃
186. 1 hours are needed to complete the whole process of early development. In comparison with B. gargarizana Can tor
B. naddie Strauch and B. melanostictus
the changes of external morphological characteristics in B. viridis Laurenti are similar to those in the other toads
but in certain aspects they exhibit their own fea tures.