| Sub-Family | 1.—The Dwarf Mergansers (Mergellus), iv., 170; the White-headed Merganser (M. albellus), iv., 170. |
| " " | 2.—The True Goosanders (Mergus), iv., 172; the Green-headed Goosander (M. merganser), iv., 172. |
SUB-ORDER XV.
THE SEA-FLIERS (LONGIPENNES).
FAMILY I.—THE TERNS (STERNÆ), iv., 176.
| Sub-Family | 1.—The Rapacious Terns (Sylochelidon), iv., 177; the Caspian Tern (S. Caspia), iv., 178. |
| " " | 2.—The River Terns (Sterna), iv., 178; the Common Tern (S. hirundo), iv., 179. |
| " " | 3.—The Dwarf Terns (Sternula), iv., 181; the Lesser Tern (S. minuta), iv., 181. |
| " " | 4.—The Water Swallows (Hydrochelidon), iv., 181; the Black Marsh Tern (H. nigra), iv., 182; the White-winged Tern (H. leucoptera), iv., 183; the White-bearded Tern (H. leucoptera), iv., 183. |
| " " | 5.—The Fairy Terns (Gygis), iv., 183; the White or Silky Tern (G. candida), iv., 183. |
| " " | 6.—The Noddies (Anous), iv., 184; the Noddy (A. stolidus), iv., 184. |
FAMILY II.—THE SCISSOR BILLS (RHYNCHOPES), iv., 185.
Sub-Family 1.—The Scissor Bills (Rhynchops), iv., 185; the Indian Scissor Bill (R. orientalis), iv., 185.
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FAMILY III.—THE GULLS (LARI), iv., 186.