REPTILES FROM SIAM. 255 



NOTE XLI. 



LIST OF REPTILES BROUGHT FROM SUM 

 BY Mr. R. C. KEÜN 



DRAWN UP BY 



Dr. Th. W. van LIDTH de JEÜDE. 



In the beginning of this year Mr. R. C. Keun , formerly 

 Consul of the Netherlands at the empire of Siam, presented 

 the Leyden Museum with a small collection of Reptiles 

 from the neighbourhood of Bangkok. As Mr. Keun, because 

 of ill-health , resigned his honourable employment , he will 

 not be in a position again to add other Siamese specimens to 

 those we have already received , and it is therefore that I 

 give a list of this valuable collection, the more valuable 

 as the Reptiles of the Indian continent are very poorly 

 represented in our Museum, those of Mr. Day's precious 

 collection ') being almost our sole representatives of the 

 Indian herpetological fauna. 



In making up this list I follow the nomenclature and 

 the arrangement adopted by Mr. G. A. Boulenger in his 

 »Reptilia and Batrachia" in »the Fauna of British India" 

 except in his adoptation of the genus Trimeresurus Lacépède. 

 The sole characteristic that, according to Lacépède, sepa- 

 rates the snakes of the genus Trimeresurus from all other 

 Opisthoglypha and Proteroglypha is the peculiar 

 arranfjemeut of the subcaudals. This characteristic is not 



1) Described by Dr. A. A. W. Hubrccht in „Notes from Leyden Maseum", 

 IV, p. 138, 



Notes from tlie Lieyden IMuseuixi, Vol. X.1II. 



