KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 55. N:0 4. 5 



7. Calotes versicolor Daud. 



3 specimens from Koh Lak, Siamese Malacca, Nov. 1914; 1 specimen from 

 Pak Koh, Northern Siam, % 1914; 5 specimens from Eastern and Middle Siarn, 1912. 

 This species is evidently distributed all över Siam in suitable localities. 

 »Rather dull and easy to catch.» (G.) 



8. Calotes emma Gray. 



2 specimens, Siam (M. Smith coll.). 



Both these specimens differ from the current descriptions in the literature by 

 having a quite well developed gular pouch which begins at the middle of the inter- 

 ramal space and extends backvvards to the shoulder girdle. The number of scales 

 is also greater than the normal record and amounts to 61 — 63 in the larger speci- 

 men. Flower mentions, however, a still larger number of scales in a specimen, said 

 to be from Bangkok, viz. 72. 



9. Calotes mystaceus Dum. & Bibr. 



5 specimens from Eastern and Central Siam, 1912. 



This species evidently does not extend to the southern parts of the country. 



10. Acanthosaura crucigera Blgr. 



1 specimen, Siam (M. Smith coll.). 



According to the dimensions of the postorbital and nuchal spines this specimen 

 must be identified as above. The number of labials, 13 above and belovv, is, however, 

 larger than this species ought to have. 



11. Acanthosaura horrescens n. sp. 



A short-tailed, spinous Acanthosaura of the an/iata-group with the nuchal crest 

 separated from the dorsal. It is also very remarkable, because it is provided with 

 a well developed transverse gular fold. In consequence of this this lizard resembles 

 the genus Gonyocephalus, but Acanthosaura with regard to the arrangement of the 

 spines and its lepidosis in general, so that I think it most correct to retain it in 

 this genus. It may be diagnosed in the following way: 



Snout a little longer than the diameter of the orbit. Canthus rostralis and 

 superciliary edge angular, the latter ending abruptly so that a short angular projec- 

 tion is formed. The longest diameter of the tympanum about equal to the eye- 

 opening. Upper head-scales keeled, some of those on the middle of the forehead 

 and a mesial row on the snout with keels radiating from a raised centre. These 



