— 7 — 



and the rostral is bordered behind by two small scales. 



In the year 1905, J. Hatori of the Sanitary Bureau of the Govemient 

 of Formosa described the present species under the name Daboia russellii 

 variety, not giving a definite scientific name. Very fortunately I was 

 recently able to compare the present species with Vipera russeUi siamensis 

 from Siam, by the courtecy of Dr. Malcom Smith of the English Legation at 

 Bankok, and came to a conclusion that the both are the same species. 



Measurements of Coluber russelli siamensis. 



Museum. 



Locality. 



Collector. 



Scale 

 rows. 



V. 



A. 



Subc. 



Oc. 



Supra- 

 n. 



L. 



Supra- 

 1. 



Body. 



Tail. 



Inst. Sci. 



Ako 



E. Matsuda 



27 



164 



1 



54 



(13(E) 



' 14(L) 



1 



4 



11 



mm. 

 800 



mm. 

 130 



>> 



Kwarenko 



>j 



27 



163 



1 



53 



f 13(E) 

 ■14(L) 



1 



4 



11 



725 



110 



» 



»» 



J. Hatori 



27 



160 



1 



42 



13 



1 



3 



10 



640 



77 



Family CROTALIDAE. 



Genus AGKISTBODON Beavois. 



17. Agkistrodon acutus (Guenther). 



Plate X. 



1888. Halys acutus Guenther, Ann. Mag. Nat. Hist. (6), I, p. 171 (Kiukiacg, 

 China). 



Three specimens from Horisha ; one from Koshun, Hoppo, Taichu, and 

 Shinko, Formosa. 



Genus TBIMERESUBUS Lacepede. 

 18. Trimeresurus mucrosquamatus (Cantor). 



Plate XL 



1835. ? Trigonocephalus mucrosquamatus Cantor, Proc. Zool. Soc. London, 1839, 

 p. 32 (Assam). 



Three specimens from Shinchiku ; two specimens from Koshun ; one 



