50 CHARADRIIFORMES 



margins. >S'. sieholdi is peculiar to Japan, S. sororius and S. 

 formosae to Formosa, S. permagnus to the Liu-Kiu Islands. 



Comparatively few fossil forms of the Coliimbidae have been 

 discovered, but Columha occurs in the Lower Miocene of France 

 and in Malta, while Lithopha^os ulnaris and Progura gallinacea 

 are recorded from the Queensland Drifts, and Ahctoroenas ? 

 rodericana is an extinct species from Eodriguez. 



