FAUNAL RELATIONS AND DISTRIBUTION 



39 



is known of the faunas of that island. Since the very closely 

 related genus Callophis is also a mainland form, the possibility 

 is strengthened that this genus has been derived through the 

 northern chain of islands. 



The second genus, Stegonotus, with two species, appears to 

 have arrived from the south by way of the southern chain of 

 islands connecting with the Moluccas. This is certainly not an 

 unreasonable conclusion since we find that the genus is as yet 

 undiscovered in both Celebes and Borneo, while the Moluccas 

 have two species. New Guinea and surrounding islands two, and 

 the Australian mainland two. 



Of the eleven families recognized in this work representatives 

 of seven occur in the Philippines. Borneo has representatives 

 of another family, the Anillidfe. It appears rather widespread 

 in the Malay Archipelago, and may eventually be discovered in 

 the Philippines. Of the subfa:milies of the Natricidte the Phil- 

 ippines have a representative of the Langahinse which apparently 

 has not been discovered in the other islands of the Malay Ar- 

 chipelago. Table 4 shows the general distribution of families. 



