Figure l.— Sketch map of Burma with the division between the so-called 



i'ERIPHERAL HiLL ' AND "CENTRAL BaSIN " REGION INDICATED BY THE FINE 

 CONTINUOUS line; the BROKEN LINE DELIMITING THE TRIANGULAR AREA REPRE- 

 SENTS THE PORTION OF BURMA TO WHICH OUR KNOWLEDGE OF THE CONSTITUTION OF 

 THE OUGOCHAETE FAUNA IS ALMOST WHOLLY CONFINED. THE HEAVY OUTLINE 

 BOUNDS THE PROVINCE EXCEPT ITS NORTHERN EXTREMITY 



