CHAPTER XXXIII.

TABLE OF AVERAGE LENGTHS OF ADDERS AND RING SNAKES IN COUNTIES AND DISTRICTS.

THE following table of the average lengths of the ring snake and adder in the various biological provinces has been prepared from the mass of correspondence in my possession relating to the local distribution of British serpents. The name of the observer in each case is appended:

The following table is a summary of information in the possession of Mr H. E. Forrest, collected in the preparation of a book on the fauna of North Wales :