CROCODILES, TORTOISES, TURTLES AND LIZARDS OF SIAM. 53 



10. Draco punctatls BIgr. 

 I'ataiii (I'eninsular Siani). 



20. Draco ctanol-emus Blgr. 

 Baiiclon (Peninsular .Siam ^. 



21. Draco formo.sus Blgr. 



Peninsular and Western Siam as far nortii as Lat. 1 1" 3U'. 



22. Draco t^mopterus Glintli. 



South-eastern Siam ; Dong Ilek Mountains (Eastern Siam) • 

 JIuang Song forest. I're ( Nortlieni Siam ). 



23. Draco hlankordi Blgr. 



Peninsular Siam ; Sai Yok district ( We.stern Siam ) ; ^Sluang 

 Song forest, Pre (Northern Siam). 



24. Draco melanopouon Blgr. 

 Nakon Sritamarat (Peninsular Siam). 

 25. Draco microlepis Blgr. 

 Island of Pennan (Peninsular Siam). 



2G. Draco quinouefasciatus Gra3\ 

 Patani and Trang (Peninsular Siam). 



27. GOXYCEPHALCS liORNEENSIS (Scllleg.) 



Bandon (Peninsular Siam). 



28. ACANTIIO.SAUKA ARMATA (Graj). 



Acdiilliosdiini rnii-/</i'ro, V>\<j^r., Cat. Liz. Brit. Mils. 1, p. 302 (1885) ; 

 id., Fauna ISrit.'lnd., Rc'i.t., n. 12;j (18!)0): id., Kept., Mai. Peiiin., 

 p. <;8 (1012): Smith, Joiir. Xat. Hist. Soc. Siam, I, p. 154 

 (l'J15). 



Widely distributed; common in the southern parts of the 

 country in suitable jungle. 



A series of 19 specimens of this very variable lizard, taken 

 recent!}' in the Mountains of Nakon Sritamarat, showed all gradations 

 in the length of post-orbital and nuchal spines. The reason for this 

 variation was not entirely clear. As one would expect, the spines were 

 usually better developed in the male than in the female, and in the 

 adult than in the young, but even when these two factors had been 

 eliminated there still remained considerable difi'erences to which no 

 cause could be assigned. On the evidence of this fine series, taken 



VOL. 11. JUNE iiui;. 



