TUBE-NOSED SWIMMERS. 55 



white patch of varying size on the under side 

 of the wing. Occurs on the North Atlantic; 

 south to the banks of Newfoundland and west 

 coast of Africa. Bare in summer. 



30. LEACH PETREL. 



8 long. Sooty black, paler beneath and 

 in a spot on the middle wing which shows dis- 

 tintcly at a distance. Spot on rump white. 

 The bill is quite large, fig 36, and the wholly 



Bill of Leach Petrel. 



black feet, when outstretched, do not reach 

 to the tip of the tail, fig. 37. This and the 

 next species fly lightly over the water near 

 the surface with a dancing somewhat erratic, 

 but very graceful movment, occasionally pat- 

 tering on the water with their feet, especially 

 when picking up food. 



The Leach Petrel occurs on the north 

 Atlantic and north Pacific Oceans, breerlinsr 



