570 CLASS AVES. 



P. Ilastata and P. Leucocephala^ Forster, MSS. t, 

 97, 98, Kuhl. Beitr. 



Brownish-black beneath ; forehead, nape, and wing- 

 coverts, white ; feet, yellow ; tail, acute, wedge- 

 shaped, as long as the wings. Length, sixteen inches. 



And probably — 



Nectris Munda, Forster, Banks, MSS. t. 24. 

 Nectris Fuliginosa^ Banks, MSS. t. 23. 

 Procellaria Hiemalis, Brehm, allied to P. Glacialis. 

 Puffinus Sericeus, Lesson, Man. 402. 



Navigators speak sometimes under the name of 

 petrels, of certain birds of the Antarctic Seas, which 

 may be divided into two genera. 



PelecanoVdes, Lacep. Halodroma, 111., 



Which with the bill and form of the petrels or puffins, 

 have the throat capable of dilatation like the cor- 

 morants, and are altogether without a thumb like the 

 albatros. 



Diving Petrel. Proc. Urrinatriai, Gm. 



Blackish-brown, with a tint of blue ; beneath, shiny - 

 white ; wings and sides, greyish-white. Forster, 

 MSS. t. 88. Puffinaria Garnotii, Lesson, Voy. Coq. 

 t. 46. 



The genus Puffinaria, Lesson. 



And 



Pachyptila, Ilig., 



Which, in other respects similar to the petrels, have 

 the nostrils separated like the puffins. The bill is 



