No. O.ii)] IXIU:U1TAX( K or IlU K IX I'OVLTIiY 



299 



The l)]aeks and dark bliirs cniil.l iv;i,lily Ix- sepa- 



rated by examining' tlic down of (';icli chick niicroscoi)- 

 ically. The blacks earry only ro, l-sliaiM.l piument 

 grainiles while in dai'k down founded ui-;inul(-~ pre- 

 dominate. These ;ii-e l'i-e( |uen 1 1 \ jiiTanu'ed ill row- a- 



wa. hroudii' into to ai.l in <liM iimni-hinu' indivi<luaU 

 which tailed to hatch, doNxn .aniph- were -avedat hatch.- 

 iii- time rroin the livin- dark blue and bhiek chicks as 

 well, and the lirst description, the record of the micro- 

 scopic examination, and the later descriptions after 

 definitive feathers were developed were carefully com- 



