234 THE GUANA. [PART II. 



other answer can be given than that the island was 

 formerly connected with the main. Fortunately 

 we have proofs of a similar disruption in the exist- 

 ence, on a small rocky islet in the Bay of Plenty, 

 of a guana, which on the main has almost become 

 extinct. I shall speak of the latter remarkable 

 fact in another place. 



