358 



ORNITHOLOGICAL EXPLORATIONS. 



as does Kamtscliatka on the Pacific. Table XX is intended to show the 

 difference between the two avifaunas. The part relating to the British 

 birds is compiled from the recent list published by the British Ornithol- 

 ogists' Union, with the exclusion of all the species which are enumer- 

 ated as " occasional and accidental visitors." This category has not 

 been recognized in the Kamtschatkan list, since it is thought that their 

 number is too small to affect the general result. 



Table XX. 



Snperfamilies. 



ColymboidesB 



Alcoidese 



Laroideee 



Procellaroideaj 



Scolopacoideae 



Gruoideae 



Anatoideae 



Ardeoidefe 



PhalacrocoracoidesB 



Tetraonoideae 



Columboidea) 



AccipitroideoB 



Strigoidese 



Ciieiiloidese 



Alcedinoideae 



PicoideiB 



Caprimulsoidese 



Micropodoidese 



Passeroideae 



