197 



3. PELAGICA. STORMY PETREL. 



P. nigra, uropygio albo. 







The bill and upper parts of the plumage are black, 

 sleek, and glossed with bluish reflections ; the brow, 

 cheeks, and under parts sooty brown ; the rump and 

 vent white ; the legs are black ; the wings are very 

 long. 



The size of the swallow. 



The female lays one white egg, spotted with pur- 

 plish brown at the larger end. 



GENUS LVII. 

 MERGUS. 



Bill slender, a little depressed, furnished at the 

 end with a crooked nail ; edges of each mandible 

 very sharply serrated; nostrils near the middle of the 

 mandible small and suboval , toes three before web- 

 bed, the outer one the largest ', the hind toe furnish- 

 ed with a fin. 



