A can til odactylus. 



55 



Greyish, brownish, or reddish above, sides aud liml)s with round 

 white spots ; back with small lilaok dots irregularly scattered or with 

 large squarish or X-shaped black spots forming two or four longi- 

 tudinal series, accompanied by whitish dark-edged spots ; lower parts 

 white. The livery of the young is still unknown. 



Measurements (in millimetres) : 



In addition to the above specimens I have examined the types of 

 A. dorsalis, Peters {L. [jJatyura, Hempr. & Ehrenb.) preserved in the 

 Berlin Museum. 



Habitat. — The Lebanon, between 2i)00 and 3000 metres, and 

 neighbouring parts of Syria. 



A. tristrami is one of the largest and heaviest Acauthodactyls. It is 

 closely allied to A. vulgaris, from which it is easily distinguished by the 

 smooth scales on the upper surface of the anterior fourth of the tail, 

 aud more nearly to the var. belli from Algeria than to the typical form 

 from Spain and Portugal. 



3. ACANTHODACTYLUS BOUETI. 



Acanthorlactylus (Latastia) bouefi, Chabauaud, Bull. Mus. Paris, 

 1917, p. 87, figs., and p. 226 ; Bouleng. Bull. Soc. Zool. France, 1918, 

 p. 147. 



