PREFACE. 



Volume V. of this Journal will be devoted to the Fauna of 

 South-west and Peninsular Siani. It will *^ive an account, as complete 

 as possible, of the IMammals, Birds, Reptiles and Batrachians of that 

 region. The numbers comprising it will be issued concurrently with 

 the usual publication of the Society, but for the sake of convenience 

 in reference, they will be retained as a separate volume. The account 

 of the Mammals and Birds has been undertaken by Messrs. Robinson 

 and Kloss, that of tix" Reptiles ami Batrachians by Dr. ^lalcohn 

 Smith. 



Tile region under survey is a long narrow strip of country 

 running due north and s>uth for nearly 500 miles. At its greatest 

 breadth it is barely 100 miles across, at its narrowest it is less than 20. 

 To the north of it lies Siam pnjper, U) the south the Malay Penin- 

 sula. Siam, howevei', with its definite seasons, and annual six 

 months of dr<3U<^ht, has a very different climate from that of the 

 Peninsula wliei-e the temperature and rainfall hardly vary from month 

 to month. Each country has thus a distinctive fauna of its own, and 

 the transitional area from one to the otlier occurs in the region which 

 has been dt'Hued as South-west and Peninsular Siam. 



The Editors. 



