( /6 ) Palmipedes. 
4. L^MEI.LIROSTHES. 
Beak thick, covered Wings moderate. Tracheal artery of 
with a soft skin rather the male generally ex- 
than a true horn ; the paneled near the bifur- 
edges with plates or cation into capsules of 
small teeth. Fig. 251. different forms: coe- 
cum long. 
FAMILY I. BRACHYPTERES. 
GENERA AND SUB-GENERA. 
1. COLYMBUS, 
Beak smooth, straight, 
compressed , pointed ; 
nostrils linear. 
«. PoDicEPS, Lath. Co- 
LYMBUS , Briss. and //- 
Itger. 
Toes enlarged (like Middle nail flattened; Plumage, of a metallic 
those of the Fulicce) in- tarsi compressed. lustre, frequently used as 
stead of true webs, those fur. 
in front united, at the 
base only, by mem- 
branes. Fig. 227, his. 
h. COLYM. PROPER, Lath^ 
Mergus, i?m\?. EuDY- 
TES, lUig. Divers. 
Feet of Palmipedes Northern Birds, visit- 
in general, that is, the ing our latitudes only in 
front toes united (to the winter, 
ends) by membranes, 
and terminated by poin- 
ted nails. 
c. TjRik, Briss. and Illig. 
Guillemots. 
Beak with feathers to No great toe. Wings still shorter than 
the nostrils, and notched m the Co lymbus. 
at the point, which is a In steep rocks, 
little arched. Fig. 230. 
d. Cephus. Greenland- 
pigeons. 
Beak shorter, with its Membranes of the toes Wings stronger, 
back more arched, with- rather deeply notched, 
out notch; symphysis of 
the lower mandible ex- 
tremely short. Fig. 228. 
