PREFACE. 



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

 South-west and Peninsular Siam. It will give an account, as complete 

 as possible, of the Mammals, 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 tliQ Mammals and Birds has been undertaken by Messrs. Robinson 

 and Kloss, that of the Reptiles and Batrachians by Dr. Malcolm 

 Smith. 



Tlie region under survey is a long narrow strip of country 

 running due north and south for nearl}'^ 500 miles. At its greatest 

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

 To the nortli of it lies -Siam proper, to the south the Malay Penin- 

 sula. Siam, however, with its definite seasons, and annual six 

 months of drought, has a very different climate from that of the 

 Peninsula where 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 tlie other occurs in the region which 

 has been defined as South-west and Peninsular Siam. 



The Editors. 



