Although this is a common bird all along the coast from northern Washington to 

 Unalaska, a fairly accessible region, its nest has never been found and the only 

 authentic egg in existence was taken by Mr. Geo. G. Cantwell from the oviduct of a 

 bird shot in the Prince of Wales Archipelago on May 23, 1897. It is now in the 

 National Museum collection, No. 28,473, and is figured in the Life Histories of North 

 American Diving Birds. There are two eggs in the National Museum collection, taken 

 in 1866, near Sitka, Alaska, by Ferd Bischoff, which are supposed to be of this species, 

 but there is considerable doubt about them. An egg in Mr. Charles E. Doe's collec- 

 tion, taken by Mr. A. H. Dunham, north of Nome. Alaska, looks authentic, but the 

 locality is far outside the known breeding range of the species and it looks very much 

 as if some mistake had been made. All other supposed eggs of this species which 

 have come to the author's attention seem to have been wrongly identified. 



Kumlien's Gull, Larus kumlieni Brewster. 



This is a doubtful species, which may prove to be only a hybrid, perhaps a cross 

 between Larus leucopterus and either L. argentatus or L. thayeri. Its breeding range 

 is not well defined. It was described from a specimen taken by Kumlien in Cumber- 

 land Sound and probably the only authentic egg" in existence is one collected by him 

 in that region, which is now in' the National Museum. Several sets of eggs, taken 

 by Mr. J. S. Warmbath on Ellesmere Land, are to be found in collections, labelled 

 Kumlien's Gull. It is now well known that the gulls collected in this locality are 

 Thayer's Gull and not Kumlien's. 



Nelson's Gull. Larus nelsoni, Henshaw. 



This is a similar species, but much rarer and even less known than the foregoing. 

 Tt is larger than Kumlien's Gull but otherwise much like it. It may be a hybrid 

 between L?rus hyperboreus and L. glaucescens or L. thayeri. Its breeding range is 

 entirely unknown, but it is supposed to breed somewhere on the Arctic coast of 

 northwestern North America. Its eggs have never been found. 



Greater Shearwater, Puffinus gravis (O'Reilly). 



There are no eggs of this species in American collections, although there are 

 plenty of eggs so labelled. Much confusion has arisen from the fact that the name 

 "Greater Shearwater" has been applied to, at least, three different species, in different 

 oarts of the world, and many dealers and collectors have therefore unintentionally 

 labelled specimens incorrectly. Supposed eggs of this species, said to have been 

 collected in Greenland, are orobablv intentional frauds; it is now generally admitted 

 that the species breeds onlv in the southern hemisphere. Eggs from the Azores. 

 Madeiras or islands in the Mediterranean Sea belong to one of the subspecies of 

 Puffinis kuhli, which is there called the "Greater Shearwater." Eggs from the Chatham 

 Islands, and other islands in New Zealand seas, are probablv eggs of the Sooty Shear- 

 water, Puffinus griseus. which is there known as the "Great Shearwater." Our 

 Greater Shearwater, Puffinus gravis, is known to breed only on Inaccessible Island, 

 one of the Tristan da Cunha ptoup in the South Atlantic Ocean. Only four esrors 

 are known to be in existence, all of which were collected bv Mr. P. C. Keytel in 1908; 

 two of these are in the South African Museum, at Cape Town, one is in the British 

 Museum and one is in the collection of Rev. F. C. R. Jourdain, in England. It hardly 

 seems possible that all of the great hordes of Greater Shearwaters, which roam 

 over the Atlantic Ocean, should nest on one small island. Possibly the main breeding 

 grounds remain to be yet discovered. 



Black-capped Petrel. .SCstrelata hasitata (Kuhl). 



The eggs of this rare petrel are entirely unknown or, at least, do not exist in any 

 collections. The bird formerly bred abundantly on the volcanic mountains of certain 

 islands in the West Indies, notably Guadeloupe and Dominica. But serious volcanic 

 disturbances, the depredations of the natives and the destructive work of the mongoose, 

 have apparently exterminated the species on the islands where it formerlv bred. 

 There may be a few left on some of the little known islands, but all recent efforts to 

 find them have been unsuccessful. 



Scaled Petrel. iEstrelata scalaris (Brewster). 



Fisher's Petrel, .SCstrelata fisheri (Ridgway). 



These two names, the former certainly and the latter probably, are synonyms of 

 Peak's Petrel, iEstrelata gularis Peale. and they should be replaced on our list by the 

 latter name. Several collections contain eggs labelled Scaled Petrel, collected at 

 Preservation Inlet, New Zealand; these are unauestionably eggs of Peale's Petrel, 

 as the parent birds, collected with them, are referable to JE. gularis. 



Kaeding's Petrel, Oceanodroma kaedingi (Anthony). 



According to the latest classification of this group of petrels the above name 

 is restricted to the small southern form and the name, O. leucorhoa beali Emerson, is 

 applied to what we have heretofore called O. kaedingi. The breeding grounds of the 

 small southern form, which probably breeds south of the United States boundary, 

 have never been found. There is a possibility, however, that O. kaedingi may have 

 been confused with O. soccorroensis, as their relationships are not yet fully under- 



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