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LAMELLIROSTRAL SWIMMERS — ANSERES. 
Genus OLOR, Waglek. 
Olor, Wagl. Isis, 1832, 1234 (type, Anas cygnus, Linn.). 
Char.* Neck very long (longer than the body), bill longer than the head (commissure longer 
than the tarsus), widening slightly to the end, the edges straight ; basal portion of the bill covered 
by a soft skin extending over the lores to the eye, the upper outline running nearly straight back 
from the forehead to the upper eyelid, the lower running from the eye obliquely downward, in a 
nearly straight line, to the rictus. Nostrils situated a little posterior to the middle of the maxilla, 
0. buccinator. 
and quite near the culmen ; no trace of a knob or caruncle at base of the bill. Lower portion of 
the tibia bare ; tarsus much shorter than the middle toe (but little longer than the inner), much 
compressed, covered with hexagonal scales which become smaller on the sides and behind. Hind 
toe small, much elevated, the lobe narrow. Tail very short, rounded, or graduated, of 20 to 24 
feathers. Wings rounded, the second and third quills longest ; primaries scarcely reaching beyond 
the ends of the secondaries. Color entirely white, the sexes alike ; young pale grayish. 
“ Synopsis of the Species. 
a 1 . The distance from the anterior angle of the eye to the hind border of the nostrils much longer 
than the distance from the latter to the tip of the bill. 
b 1 . The yellow color at the base of the bill extending beyond the nostrils. 
* “ Diagn. Predominant color of the adults white ; the young with downy or feathered lores, the down 
on the sides of the bill terminating far back of the nostrils, and forming very distinct loral antiaj ; tertiaries 
and scapulars normal, not crisp ; tail longer than the middle toe with claw, rounded ; inner webs of outer 
three primaries, and outer webs of the second, third, and fourth, sinuated ; webs of the feet not scalloped ” 
(Stejneger, tom. cit. pp. 197, 198). 
