8 NILS GYLDENSTOLPE, THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 1. SNAKES. 



C. Acrochordus javanicus Hornst. 



One specimen, Bangkok, Jan. 1915. 

 Siamese name: ngu nguang chang. 



A fairly large specimen was caught by a coolie in the Klong running through 

 the compound of the Siamese Electricity Company in the middle of Bangkok. It 

 showed a very sluggish disposition, and even when being chloroformed it made very 

 few movements, only making some hissing sounds. Just before it was captured it 

 had eaten a fairly large fish (of about 450 mm.) which it at once vomited up when 

 caught. 



The dried skin measures 1665 mm. from tip of nose to end of tail. 



7. Chersydrus granulatus Schneid. 



One specimen, Siarn, 1914 (M. Smith coll.). 



This snake is rather common in the river mouths and the adjacent sea-coasts 

 of the Gulf of Siarn. 



Total length of the specimen collected = 876 mm. 



Length of tail = 95 mm. 



The colour is dark olive with påle crossbands which are rather indistinct on 

 the vertebral line of the body. 



8. Polyodontophis collaris Grav. 



One specimen, Doi Par Sakeng, near Mnang Fång, North-western Siarn, 1914. 



My specimen has the loreal a little longer than deep; on one side both the 

 postoculars are in contact with the parietal; temporals 1 + 2; 10 upper labials. On 

 the vertebral line there are small, round, black spöts, increasing in number on the 

 anterior part of the body. 



Total length = 257 mm. Length of tail = 40 mm. Ventrals = 172. Sub-cau- 

 dals 4 %o. 



Thia species which inhabits the Himalayas, Assam, Arrakan, Upper Burma and 

 Southern China has not, as far as I know, been previously recorded from Siarn. 



9. Tropidonotus piscator Sohneid. 



One Bpecimen, Klong I )«>i Bangkok, February L916. 

 One specimen, Bangkok, 1 9 1 I . 

 Two ipecimens, Bangkok, L914 (V. Wibgbeh coll.). 

 One specimen, Kob Lak, Siamese Malava, ,, /n l'.'!! 



