20 THE ZOOLOGIST. 



escent, colouring all over (including the head and extremities), 

 which soon, however, disappeared on their being set in a 

 terrarium, and gave place to the usual green colour." He 

 connects this with a similar change in the colour of L. viridis 

 recorded by Vallisnieri, and referred to in Prof. Leydig's work on 

 the German Saurians, p. 166. Other instances of a like nature 

 — due in all cases to the action of the chromatophores — have 

 been observed with the Batrachia, and with the m all variations of 

 colour, whether seasonal or otherwise, are more rapidly produced 

 and effaced.* 



The term local, as applied to many forms of this species, is a 

 little misleading, only a few being characteristic of distinct 

 localities, though they certainly do not all occur promiscuously. 

 Passing the whole series of varieties in review, we find that 

 the main types change as we proceed from west to east ; in the 

 former the ocellated, in the latter the longitudinally striated 

 varieties are more prevalent. 



On the Kaiserstuhl, L. viridis was pairing about the middle 

 of April or later, the males in slight numerical preponderance, 

 and I have found the eggs as early as the latter part of June, 

 once or twice under stones, a fact which perhaps indicates (as 

 others have already observed) that the female had carried them 

 there for safety. 



The " voice " of L. viridis consists in a hissing or rasping 

 sound, which appears to be by no means common to all indi- 

 viduals, and I noticed that the few of this species and of L. agilis 

 which possessed this peculiarity were males. The power of emit- 

 ting sounds appears more general with the viridis of Trieste (Prof. 

 Landois, cited by Eimer) : according to the last-named naturalist, 

 L. muralis ccendea is equally capable of producing them. 



In the instances which have come under my notice an 

 examination failed to reveal any catarrhal symptoms, such as 

 those which seem to affect some individuals of L. muralis when 

 subject to sudden changes of climate. A pathological condition 

 similar to this last is described by J. J. Tschudi in the case of 

 L. agilis, but with this notable difference, that here the lizards 

 were found in this state, and infected two others with which they 

 were afterwards confined. 



: ' ; Leydig, ' Uber das Blau,' &c, 1889, 



