gallery.] natural history. 25 
Cases 148_150. The Sea Ducks are principally inhabitants of the 
ocean or saline lakes, and are sometimes found on rivers of the inte¬ 
rior, seeking for small crabs, shell-fish, &c.; as the scoter duck, eider 
duck, tufted duck, nyroca duck, red-crested duck of Britain, &c. 
Case 150. The Spinous-tailed Ducks are found in the warmer 
parts of the world, as the lobated duck of Australia, Ural duck, &c. 
Case 151. The Mergansers inhabit the Arctic regions; their food 
consists principally of fish, &c. ; as the goosander merganser, red¬ 
breasted merganser, hooded merganser, &c. 
Cases 152,153 contain the Divers: they form two divisions. 
Case 152. The True Divers are found in northern regions, and 
are rapid divers, feeding on fish ; as the northern diver, black-throated 
diver, &c. 
Case 153. The Grebes inhabit most parts of the world, feeding on 
small fish, crabs, &c.; as the eared grebe, crested grebe, &c., of Britain. 
Cases 154, 155 contain the Auks; these are oceanic birds, inhabit¬ 
ing the Arctic circles, feeding on fish and other marine productions, 
and are thus divided: 
Case 154. The True Auks ; as the great auk of Orkney, puffin auk, 
razor-billed auk of the British shores, &c. 
Case 155. The Sea Parrots; as the parroquet auk, crested auk, Cape 
penguin, crested penguin, &c.; the Guillemots; as the foolish guillemot, 
black guillemot of Britain. 
Cases 156 — 161 contain the Gulls : these birds are divided as fol¬ 
lows : 
Case 156. The Petrels, which are found in the high latitudes of 
both hemispheres, feed on fish, &c.; as the diving petrel, stormy petrel, 
Manks petrel, Fulmar petrel, and broad-billed petrel, &c.; giant petrel, 
wandering albatross, &c. 
Cases 158—160. The True Gulls: they are found in every part of 
the world, feeding on all kinds of animal matter, fish, &c.; as the Arctic 
gull, glaucous gull, black-backed gull, little gull, &c., of Britain; fork¬ 
tailed gull, kittiwake gull, &c. 
Case 161. The Terns are met with on every coast in the world, and 
occasionally inland, on the lakes, feeding on marine productions; as 
the Caspian tern, roseate tern, gull-billed tern, minute tern, &c., of 
Britain; white-winged tern, &c. The Skimmers have remarkably 
formed bills, that enable them to skim the surface of the sea, in which 
they dip the lower mandible, the upper being elevated out of the water, 
until the prey is felt by the lower ; as in the black skimmer. 
Case 162. The Tropic Birds are peculiar to tropical climates, 
where they catch the fly-fish, &c., as the common tropic bird, red-tailed 
tropic bird, &c. The Darters live in small flocks, on the trees that 
overhang the rivers, &c., from whence they plunge into the water, and 
catch fish by darting at them with their sharp bill and long vibrating 
neck; as the white-bellied darter, &c. 
Cases 162—166. The Pelicans that inhabit the marshes and sea 
coasts, feeding on fish, &c. ; as the gannet of Britain, &c. Cases 163 
and 164. White pelican, red-backed pelican, &c. Case 165. Common 
cormorant, shag of Britain, &c.; and Case 166. Greater frigate bird, 
and lesser frigate bird. 
c 
