AcanthoiJadijlns. 



55 



Greyish, brownish, or reddish above, sides and limbs with rouud 

 white spots ; back with small ])lack dots irregularly scattered or with 

 large squarish or X-^haped black spots forming two or four longi- 

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

 white. Tlie livery of the young is still unknown. 



Measurements (in millimetres) : 



Particulars of Specimens Examined. 



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

 A. clorsalis, Peters (L. platyK^ra, Hempr. & Ehrenb.) preserved in the 

 Berlin Museum. 



Hahitat. — The Lebanon, between 2000 and 3000 metres, and 

 neighbouring parts of Syria. 



A. tristrami is one of the largest and heaviest Acanthodactyls. 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, 

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

 from Spain and Portugal. 



3. ACAN"THODACTYLUS BOUETI. 



Acantliodactyhis (Latastia) houeti, Chabanaud, Bull. Mus. Paris, 

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

 p. 147. 



