PKOCELLARIHXE PRIOCELLA 473 



some feathers on the flanks, under wing coverts and some of the 

 under tail-coverts grey. 



Iris dark brown ; bill greenish-yellow, the nostrils and culmen 

 black, mandible greenish-horn, the lines of division black ; tarsi and 

 toes bluish-brown, the outer toe darker, the webs with a yellow 

 tinge. 



Length (in flesh) 18-0; wing 12-75; tail 4-25; tarsus 2-20; 

 middle toe 2*40 ; culmen 2'05. 



Distribution. The Great Grey Petrel is found throughout the 

 Southern Ocean and is generally distributed between the 30th 

 and 55th parallels of South latitude. It was found breeding 

 on Bound Island near Mauritius many years ago by Mr. Layard, 

 and is stated to nest on Kerguelen by Captain Hutton (Ibis, 1865, 

 p. 286) but it has not been noticed since by the Transit of Venus 

 Expedition or by Mr. Hall. 



This Petrel is not uncommon in the Cape Seas ; Captain Hutton 

 obtained it in April, 1866, in 36 S. lat., 2 E. long., and in 35 S. 

 lat., 15 E. long.; Lord Lindsay on September 21, in 35 S. lat., 

 9 E. long., and the Southern Cross Expedition in 42 S. lat., 20 E. 

 long., while there is an example in the South African Museum, 

 a female obtained in September, 1903, by Captain Turbyne of the 

 S.S. " Pieter Faure," about forty miles west of Cape Point. 



Genus III. PRIOCELLA. 



Type. 

 Priocella, Hombr. & Jacq. Compt. Bend, xviii, 



p. 357 (1844) P. glacialoides. 



This genus is closely allied to Puffinus, but the nasal tube is 

 longer, about one-third of the length of the bill and opens for- 

 wardly ; there are fourteen tail-feathers instead of twelve. 



Only one species, found throughout the Southern Ocean, is 

 assigned to this genus. 



dWW**^ 



789. Priocella glacialoides. Silver-grey Petrel. 



Procellaria glacialoides, Smith, III Zool. S. Afr. Avcs, pi. 51 (1840) ; 



Layard, B. S. Afr. p. 361 (1867). 

 Thalassceca tenuirostris (nee Temm.), Sliarpe, ed, Layard's B. S. Afr. 



p. 767 (1884). 

 Priocella glacialoides, Sulcin, Cat. B. M. xxv, p. 393 (1896); Shelley, 



B. Afr. i, p. 167 (1896) ; Parkin, Ibis, 1900, p. 675 ; lieiclienow, Vac/. 



Afr. i, p. 27 (1900) ; Vcmhofen, Jouni. Omith. 1901, p. 310. 



