126 PATAGONIAN EXPEDITIONS! ZOOLOGY. 



Wing: Black with a greyish tinge. The scapulars greyer and each 

 feather edged with white or whitish. 



Tail : Middle pair of rectrices sooty black, the remaining ones with 

 white bases. 



Lower parts : Upper breast and neck black of a greyish sooty cast. 

 Sides, flanks, lower breast and abdomen pure white. Lower tail coverts 

 nearly as long as the rectrices and greyish sooty black in color. 



Inner under wing coverts white. 



Bill black. 



Legs black. 



Feet dusky. 



Iris brown. 



The adult female resembles the adult male in size and color. 



"No. 65. Female: off St. Ambrose, July 20, 1879. Bill and feet 

 black. Mr. Salvin 1 has already suggested the identity of the Chilian birds 

 described by Mr. Elliot and Drs. Philippi and Landbeck with O. teuco- 

 gastra of Gould (P. grallaria V.) ; and from the specimen now sent by 

 Dr. Coppinger, I must say that I can see no difference at all." (Sharpe, 

 Pro. Zool. Soc. 1 88 1, p. n.) 



Geographical range. Southern Oceans. North in the Atlantic (casu- 

 ally ?) to the Florida Coast. (St. Marks, Gulf Coast, Florida. Cf. Law- 

 rence, Ann. Lye. New York, V. p. 117 (1851). 



I am unable to discover any record of the breeding grounds of this 

 petrel. 



The description here given is based on the series of F. grallaria in 

 the British Museum of Natural History. This species was not obtained 

 or observed by the Princeton Expeditions to Patagonia. 



Dr. Coppinger says in speaking of this Petrel, Fregetta grallaria, under 

 the head of Thalassidroma leucogaster, "In the course of this cruise we 

 were followed by great numbers of petrels, among which were the giant 

 petrel (Ossifraga gigantea], the Cape pigeon (Daption capensis], and two 

 species of Thalassidroma (I think T. leucogaster and T. Wilsoni]. I 

 noticed on this, as on several subsequent occasions, that the little storm 

 petrel is in the habit of kicking the water with one leg when it is skim- 



1 Scl. & Salv. in Voy. Chall., Zool. II. pt. VIII. p. 141 (188 i). 



