CHAP. IX.] TABLES OF DISTRIBUTION. 179 



distribution have been constructed for tlie whole of the Mam- 

 malia and Birds, they must necessarily contain many errors of 

 detail ; but with all their imperfections it is lielieved they will 

 prove very useful to naturalists, to teachers, and to all wd)o take 

 an intelligent interest in the wider problems of geography and 

 natural history. 



X 2 



