18 



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



25. Hypsirhina enhydris Schneid. 



One specimen, Bangkok, 1914 (M. Smiith coll.). 

 > » , neighbourhood of Bangkok, 1914 (M. Smith coll.). 



» > , Bangkok (V. Wirgeen coll.). 



» » , Bangkok, 1914. 



The total length of the specimen collected by me at Bangkok is 826 mm. and 

 the length of the tail = 152 mm. 



Boulenger gives the total length to 650 mm. (Fauna of the Malay Penin- 

 sula). 



Very remarkable is the bright colour of the last 3 rows of costal scales. 



26. Hypsirhina bocourti Jan. 



Seven specimens, Bangkok (V. Wirgeen coll.). 

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



Siamese name: ngu pla (narae for all fresh water snakes). 



Fairly common at the neighbourhood of Bangkok. 



In specimen N:o 1 the frontal is much shorter than the parietals and shorter 

 than its distance from the end of the snout. In this specimen, as well as in all the 

 other, the 7 th upper labial is ahvays divided and in specimen N:o 4 both the 7 th 

 and the 8 th upper labials are divided. In specimen N:o 3 there are 5 lower labials 

 in contact with the anterior chin-shields. In specimen N:o 6 the supraocular is 

 divided and in N:o 7, the internasal is divided. 



N:o 



Locality 



Ventrals 



Suli- Total 



caudala length 



Tail Pra3 ' Po8t ' Tera P°- I Upper , Scalea 



ocular ocular räls labials 



Bangkok 

 Bangkok 

 Bangkok 

 Bangkok 

 Bangkok 

 Bangkok 

 Bangkok 

 Bangkok 



i :i:s 

 180 

 1 29 

 128 

 133 

 126 

 132 

 130 



50 

 50 

 3'J 

 3'J 

 48 

 48 

 48 

 48 

 4!l 

 4!) 

 40 

 40 

 46 

 48 

 18 

 4'i 



989 

 978 

 B00 

 855 

 620 

 510 

 628 

 333 



179 

 128 



142 



1 58 

 BO 



00 

 77 

 is 



1 -I 2 



1 +2 



1 I 2 



2 I 2 

 1 +2 

 1 +2 

 1 + 2 

 1 +2 



8 

 8 

 8 

 s i '.) 

 8 

 8 

 8 

 8 



27 

 27 

 21 

 27 

 27 

 27 

 27 



