NATATORES. 483 



and the ear-coverts slate-colour ; sides of the chest, back of 

 the neck, and upper part of the back dark grey, gradually 

 passing into the dark brown of the back and wings ; upper 

 tail-coverts light grey ; primaries and tail black ; irides dark 

 reddish brown ; legs and feet black ; webs yellow. 



The plumage of the immature birds being carefully repre- 

 sented in the drawing, a minute description is unnecessary. 



Genus HALADROMA, Illiger. 



Of this singular southern form two species are known only, 

 one of which, I believe, pertains to the avifauna of Australia. 



Sp. 650. HALADROMA URINATRIX. 



Diving Petrel. 



Procellaria urinatrix, Lath. Ind. Orn., vol. ii. p. 827. 



Haladroma urinatrix, 111. Prod. Syst. Mamm. et A v., p. 274. 



Diving Petrel, Lath. Gen. Syn., vol. vi. p. 413. 



Procellaria tridadyla, Foi'st. Drawings, No. 88. 



Halodroma urinatrix, Steph. Cont. of Shawns Gen. Zool., vol. xiii. 



p. 257. 

 Puffinuria garnotii. Less. Zool. de la Voy. de la Coq., pi. 46. 

 Pelecano'ides urinatrix, Cuv. 

 Tee-tee, Aborigines of New Zealand. 



Puffinuria urinatrix, Gould, Birds of Australia, fol., vol. vii. pi. 60. 



I observed that this curious little bird was very abundant 

 in Storm Bay, in Tasmania ; I have also seen specimens from 

 New Zealand. As might be supposed from its structure, the 

 habits and economy of this Diving Petrel are totally different 

 from those of all the other members of the family. It possesses 

 none of those vast powers of flight common to the rest of the 

 Petrels, but has this loss amply compensated for by its powers 

 of diving, which are so great that it is even said to fly under 

 water. Its flight is a curious fluttering motion, performed so 

 close to the surface that it rarely rises high enough to top the 



