500 



Zoological Society : — 



examination of figs, c and d, which give the outlines of this part 

 of the skeleton of G. nesiotis and G. chloropus. The sternum of 



Fig. a. Fig. b. 



G. nesiotis is much shorter, broader, and the keel is not nearly so 

 deep. The following are some of the most important corresponding 



Fig. c. Fig. d. 



dimensions of this part of the two birds in inches and decimal 

 parts : — 



