CH. IV] 



THE HOLLOW CURVE 



37 



N2 of species 



10 



(00 



■2 -4 -6 -8 10 1-2 1-4 



log (N? Of species) 



Fig. 3. Logarithm curve for Rubiaceae (from WiUis, Dictionary). 

 (By courtesy of the Editor of Nature.) 



Fig. 4. Logarithm curve for Chrysomelid beetles (from old Catalogue). 

 (By courtesy of the Editor of Nature.) 



