14 CLASS II. ORDER VI. 
Auca, (awk,) bill toothless, short, compressed, 
convex, often transversely furrowed ; lower mandi- 
bles gibbose near the base ; nostrils linear ; legs 
mostly three-toed. | 
Aprenopyta, (penguin,) bill straight, a little 
compressed and sharp-edged, upper mandible lon- 
gitudinally, obliquely grooved, the lower truncate 
at the tip ; tongue with reflected prickles ; wings 
fin-form, without quill-feathers ; feet fettered, 
four-toed. 
Section B. Long-winged flying sea birds. 
Procevvaria, (petrel,) bill toothless, a little 
compressed, hooked at the point; mandibles equal ; 
nostrils cylindrical, tubular, truncate, lying on the 
base of the bill ; feet palmate ; the back toe point- 
ing downwards, sessile, sharp, a mere spur. 
Diomepea, (albatross, man-o-war bird,) bill 
straight, upper mandible hooked at the point, low- 
er truncate ; nostrils oval, wide, prominent, late- 
ral; tongue very small; feet four-toed, all placed 
forward. 
Larus, (gull, sea-mew,) bill straight, sharp- 
edged, a little hooked at the tip, and without teeth; 
lower mandible gibbose below the point ; nostrils 
linear, broader on the fore part, and placed in the 
middle of the bill. nes 
Srerna, (tern, noddy,) bill subulate, straightish, 
pointed, a little compressed, without teeth ; nos- 
trils linear; tongue pointed ; wings very long ; 
tail mostly forked. 
Ruyncuors, (skimmer,) bill straight ; the up- 
er mandibles much shorter; the lower truncate 
at the tip. 
