222 
CHAPTER X. 
LONGIPENNES ; LONG-WINGED. SKIMMERS SINGULAR 
BILL. TERNS, OR SEA-SWALLOWS ANECDOTE OF. 
GULLS CAPACITY FOR ENDURING COLD VORACIOUS 
FEEDERS BREEDING PLACES. — SOUTH STACK DE- 
SCRIBED. ALBATROSS ROAMING HABITS. TRISTAN 
d’acunha: RESORT FOR BREEDING VORACITY. 
PETRELS — NESTS — -FEED AT NIGHT SUPERSTITION 
OF SAILORS RESPECTING. 1 — BREVIPENNES; SHORT- 
WINGED. — DIVERS. CRESTED GREBE GREAT DE- 
STROYERS OF FISH. GUILLEMOTS. RAZOR-BILLS. 
PUFFINS AND AUKS. 
Table XXIX. (See vol. i., p. 24 .) 
Order 6. Palmipedes. Tribe 3. Longipennes. 
{Long-winged). 
This tribe comprises : — 1 . Rhynchops or Skimmers ; 
2. Sterna, Terns ; 3. Larus, Gulls ; 4. Diomedcea, 
Albatross ; 5. Procellaria, Petrels. 
All these are long- winged birds, proper to the main 
ocean, and, by means of their powers of flight, are 
spread widely over the world. They may be known 
by either having no back-toe at all, or by that toe 
being free— that is, not united with the others by a 
membrane, forming one large web, as in the pre- 
ceding tribe ; and by their bill, without indentations, 
but bent at the end, as in the Procellaria or Petrels, 
the extremity of which seems to consist of a piece 
fastened on, or pointed, as in all the rest. 
The Skimmer (Rhynchops) derives its name from 
