REPORT ON THE BIRDS— THE PROCELLARIID.-E. 



141 



obtained during the visit to Kerguelen Island ; others were secured at sea in the South 

 Pacific Ocean, a few near the Straits of Magellan, at Nightingale Island, and elsewhere. 

 None of the species present any difficulty as regards their nomenclature ; but I take this 

 opportunity of adding a few notes on this subject, gathered during recent study of the 

 species to which they belong. 



1. Oceanites Oceanians, Kuhl. 



Procellaria oceanica, Kuhl, Beitr., p. 136, pi. x. fig. 1. 



Oceanites oceanica, Coues, Pr. Ac. Phil., 1864, p. 82; Salv., Orn. Misc., vol, ii. p. 227; et Proc. 

 Zool. Soc, 1878, p. 735. 



[cc-c. Males. 

 d, e. Females. 



Ice Barrier, February 14, 1874.] 



2. Fregetta grallaria, Vieill. 



Procellaria grallaria, Vieill., N. Diet. d'Hist. N., vol. xxv. p. 418. 



Fregetta grallaria, Bp.,Consp., vol. ii. p. 197 ; Coues, Pr. Ac. Phil., 1864, p. 86; Salv., Proc. 



Zool. Soc, 187S, p. 735. 

 Thalassidroma leucogastra, Gould, Ann. and Mag. Nat. Hist., vol. xiii. p. 367, et B. Austr., 



vol. ii. pi. lxiii. 



[Nos. 568-571. Females.) g^ padfi November n 1875 . 



Nos. 572, 573. Male. J 



Eyes brown. Their stomachs were filled with a yellow oil, and mixed with it some 

 pieces of Crustacea.] 



I am strongly disposed to add to the above synonyms Thalassidroma gracilis, Elliot, 

 Ibis, 1859, p. 391, and Thalassidroma segethi, Phil, and Landb., Arch. f. Naturg., 1860, 

 names admitted by many authors to apply both of them to a species found on the 

 Chilian coast. I have seen specimens of the present species in the Paris Museum from 

 the same locality ; and the Challenger specimens now before me were obtained at sea at 

 no great distance from the same shore, so that on geographical grounds their identity 

 is a reasonable supposition. The chief, if not the only discrepency I can find between 

 the description of Fregetta gracilis and Fregetta grallaria is one of dimensions, the 

 former being considerably smaller (as shown by Mr Elliot's measurements) than the 

 Challenger birds. Thus we have : — 



