° 1918 J Proposed Changes in the A. O. U. Check-List. 201 



Recognized as a subspecies to include birds breeding in Alaska and 

 Siberia. (Cf. Mathews, Birds Australia, II, pt. 5, Jan. 31, 1913, p. 498.) 



Pagophila alba (Gunnerus) becomes Pagophila eburnea (Phipps) 

 (Larus eburneus Phipps, Voy. North Pole, Append., 1774, p. 187), 

 because Larus albus Gunnerus is not certainly identifiable. (Cf. 

 B. O. U. Committee, List Brit. Birds, ed. 2, 1915, p. 394.) 



Larus thayeri Brooks becomes Larus argentatus thayeri Brooks, 

 because of intergradation with Larus argentatus. (Cf. Dwight, 

 The Auk, XXXIV, No. 4, Oct., 1917, pp. 413-414.) 

 fLarus ridibundus Linnaeus, Syst. Nat., ed. 12, I, 1766, p. 225 (Europe). 

 Recorded from a specimen taken on the western coast of Greenland. 

 (Cf. Schi0ler, Dansk Ornith. For. Tidssk., XI, Hsefte3-4, Sept., 1917, 

 p. 175.) 



Larus affinis Reinhardt becomes Larus fuscus affinis Reinhardt. 

 (Cf. Iredale, Bull. Brit. Ornith. Club, XXXI, No. CLXXXVI, March 

 29, 1913, pp. 68-69.) 



Larus atricilla Linnaeus becomes Larus atricilla megalopterus 

 (Bruch) (Atricilla megalopterus Bruch, Journ. f. Ornith., 1855, p. 287; 

 Peru and Mexico), by recognition of the North American birds as 

 subspecifically distinct. (Cf. Noble, Bull. Mus. Comp. Zool., LX, 

 No. 10, Aug., 1916, p. 367.) 

 fCalonectris Mathews and Iredale. New genus. Mathews and Iredale, 

 Ibis, ser. 10, III, No. 3, July 2, 1915, pp. 590, 592 (type, Puffinus 

 leucomelas Temminck). (Cf. Mathews and Iredale, Ibis, 1915, pp. 

 590-594; Oberholser, The Auk, XXXIV, No. 4, Oct., 1917, pp. 

 471, 475.) Of North American species it includes only Puffinus kuhlii 

 borealis Cory, which therefore becomes: 

 Calonectris kuhlii borealis (Cory). 

 fArdenna Reichenbach, Nattirl. Syst. Vogel, 1852 (1853), p. IV (type, 

 Procellaria major Faber = Procellaria gravis O'Reilly). Revived as 

 a genus (cf. Mathews and Iredale, Ibis, 1915, pp. 590-591; and 

 Oberholser, The Auk, XXXIV, No. 4, Oct., 1917, pp. 471, 475); and 

 will include the following North American species now in the genus 

 Puffinus: 



Ardenna carneipes (Gould). 

 Ardenna creatopus (Coues). 

 Ardenna gravis (O'Reilly). 

 fHemipuffinus Iredale, Austral Avian Record, II, No. 1, Aug. 2, 1913, 

 p. 20 (type, Puffinus carneipes Gould). Proposed (loc. cit.) as a genus 

 to include Puffinus carneipes Gould. Accepted as only a subgenus of 

 Ardenna Reichenbach. (Cf. Oberholser, The Auk, XXXIV, No. 4, 

 Oct., 1917, p. 471.) 



Puffinus assimilis Gould becomes Puffinus assimilis godmani 

 Allen. Puffinus godmani Allen, The Auk, XXV, No. 3, July, 1908, 

 p. 339 (Madeira). (Cf. Hartert, British Birds, VIII, No. 12, May 1, 

 1915, pp. 282-283; IX, No. 2, July 1, 1915, p. 56.) 



