177 



terrupted band of white, minutely freckled with white^ margined 

 with brown and slightly tipped with white ; chest crossed by an ir- 

 regular band of black, beyond which the under surface is white ; 

 under tail coverts grayish black tipped with white ; irides brownish 

 buff, brovra predominating near the pupil ; eyelash pale olive yellow ; 

 bill straw- white with olive and black culmen ; legs and feet straw- 

 yellow. 



Total length, 40 inches; bill, 4; wing, 25; tail, 10; tarsi, 7^. 



Hab. Plains of the interior of Australia generally. 



Anas n^vosa. Anas intense fusca, plumis albo irroratis et longi- 

 tudinalitcr notatis. 



The whole of the plumage dark brown, minutely freckled and 

 spotted with irregular oblong marks of white in the direction of the 

 feathers ; the under surface the same, but lighter and tinged with 

 buff; wings without a speculum ; primaries plain brown ; irides light 

 brown ; bill greenish gray, becoming much darker at the tip ; legs 

 bluish green. 



Total length, 17 inches ; bill, 2^ ; wing, 9 ; tail, 3 ; tarsi, 2. 



Hab. Western Australia. 



The above is the description and measurements of a female. 



SuLA AusTRALis. Sula primariis alarum et secondariis necnon 

 rectricibus caudce duabus intermediis fuliginoso-fuscis ; tar sis antice 

 digitisque viridi-flavis. 

 Crown of the head and back of the neck beautiful buff; the re- 

 mainder of the plumage white, with the exception of the primaries, 

 secondaries and four centre tail-feathers, which are fuliginous brown 

 with white shafts ; irides olive white ; bill brownish horn-colour 

 slightly tinged with blue ; space round the eye leaden blue ; bare 

 skin at the base of the beak and down the centre of the throat nearly 

 black ; front of the tarsi and toes sickly greenish yellow ; webs 

 brown. 



Total length, 32 inches ; bill, 5^ ; wing, 19 ; tail, 10 ; tarsi, 2. 

 Hab. The Tasmanian Seas. 



The specimen exhibited is from the River Derwent. Like the 

 other members of its family, this species will allow of its being taken 

 with the hand. Some of my specimens were so taken on a rock on 

 the Actseon Islands. 



The circumstance of being enabled to bring an entirely new Al- 

 batros before the notice of the Society is a source of great gratifica- 

 tion to me, since the group to which it belongs had already been 

 paid much attention to by our early voyagers and later naturalists. 

 The present bird differs from all the other species in the extreme 

 caution with which it avoids rather than approaches the neighbour- 

 hood of vessels at sea. It is rather abundant in Bass's Straits and 

 in all the seas off Van Diemen's Land. 



From its shyness, I propose to name this species 



DioJLEDEA CAUTA. Diom. verticc albo ; faciei cotorc e margaritd 



