256 REPTILES FROM SIAM. 



to be fouud in one of the species belonging to the genus 

 Trimeresurus according to Mr. Boulenger. Moreover the 

 species first described by Lacépède, viz. Trimeresurus 

 leptocephalus (a snake in my opinion very closely related 

 to Naja porphyriaca Shaw and Naja australis Gray, both 

 agreeing in having the peculiar arrangement of the sub- 

 caudals described by Lacépède) can by no means be classed 

 in the genus Trimeresurus according to Mr. Boulenger. I 

 think it better to adopt Wagler's genus Bothrops and , if 

 it should be found desirable to preserve Lacépède's genus 

 Trimeresurus, I would substitute it for Wagler's genus 

 Pseudechis. 



Mr. Keun's collection consists of 14 specimens belonging 

 to 12 species, viz. 11 species of Op hi dia and 1 species 

 of Batrachia apod a. 



Ophidia. 



1. Cylindrophis rufus Laur. 



2. Hydrophohus davisonii Blanf. 



3. Simotes cyclurus Cant. 



4. Zamenis korros Schleg. 



5. Tropidonotus subminiatus Schleg. 



6. „ piscator Schneid. 



7. Dryophis mycterizans Daud. 



8. Chrysopelea ornata Shaw. 



9. Homalopsis buccaia L. 



10. Hypsirhina enhydris Schneid. 



11. Bothrops gramineus Shaw. 



JBatfitchia npoda. 



12. Ichthyophis glutinosus L. 



Leyden Museum, October 1891. 



Notes irum the Leyden Aluseutxi , Vol. X.I11 



