DESCRIPTIVE LIST 41 



on Royal Shoal, and left them in a great windrow along the beach. (See photo- 

 graph in Bird-Lore, vol. 10, p. 125.) The terns at once took possession of the part 

 of the island occupied by the Skimmers, scratched holes in the sand for their nests, 

 and buried or kicked the Skimmers' eggs out of the way." PEARSON. 



III. ORDER TUBINARES. TUBE-NOSED SWIMMERS 



The representatives of this order are all birds of the high seas. They are much 

 like the Long-winged Swimmers in general appearance, but the covering of the bill 

 is composed of several pieces separated by deep grooves. The bill is hooked at the 

 tip, and the nostrils are tubular. But one family is represented in our fauna. 



7. FAMILY PROCELLARIID>. FULMARS, SHEARWATERS, AND PETRELS 



Nostrils united in a double tube placed on the culmen. Only two genera are 

 known to occur on our coast, but another is not unlikely to visit it. 



KEY TO GENERA 



1. Secondaries 13 or more in number. Wing more than 7.00. Partition between nostrils very 



thick. Puffinus. 

 1. Secondaries 10. Tarsus over 1.25. Wing less than 7.00. Oceanites. 



Genus Puffinus (Briss.) 



KEY TO SPECIES 



Four species have been recorded, and may be distinguished as follows: 



1. Dusky above and below. Sooty Shearwater. 



1. Dusky above, white below. See 2. 



2. Wing less than 12.00. Audubon's Shearwater. 



FIG. 20. CORY'S SHEARWATER. 



2. Wing more"than 12.00. See 3. 



3. White of throat, shading gradually into dusky of head and neck. Cory's Shearwater. 



3. White of throat, separated abruptly from dusky of head and neck. Greater Shearwater. 



