230 
AVF.S. 
towards the tip, and projecting over the point of the lower one ; 
nostrils basal and lateral, pierced in a membranaceous space, 
and protected by a cartilaginous scale, naked in some and fea¬ 
thered in others ; wings generally short and concave ; tail con¬ 
sisting of from ten to eighteen feathers ; tarsus long ; feet with 
three toes before and one behind, united at the base by a mem¬ 
brane ; the hallux articulated upon the tarsus, above the junc¬ 
tion of the anterior toes. 
Genus 1.—PA VO.— Linnceus. 
Generic Character. —Bill without a cere, convex above, thick¬ 
ened and bent down towards the tip; nostrils open ; cheeks 
partly bare ; tail coverts very long; tail consisting of eighteen 
elongated, broad, and ocellated feathers, capable of being ex¬ 
panded like a fan; tarsus considerably larger than the middle 
toe, with a conical spur a little way above the hallux; head pro¬ 
vided with a crest. 
Pavo Aldrovandi. — The Aldrovandine Peacock. 
Plate LI 11. fig. 1. 
Upper parts and breast rich green ; breast, abdomen, and cris- 
sum, dull bluish green with crescent-shaped black spots ; wings 
iridescent Antwerp-blue ; the three outer quills, greater and 
middle wing coverts, dull fawn colour; neck long, golden green ; 
cheeks gray, front blue ; crown surmounted by a crest of fifteen 
gray plumes, the centre ones longest and green at the points; 
tail yellow-green, each feather ocellated near the point, blue in 
the centre and margined with reddish-fawn colour; bill, legs, 
and feet, gray. Size of common peacock. Inhabits the Cape 
of Good Hope. 
Genus 2.— GALL US,— Brisson. 
Generic Character .—Bill of medium size, strong and naked 
at the base ; upper mandible arcuated, convex, and bent at its 
tip; head surmounted by a fleshy crest, and wattles on the 
throat; ears without a cover of feathers ; three toes before, 
united the length of the first joint; the hallux placed high 
upon the tarsus, and not resting on the ground, above which 
is a long conical spur; claws blunt; middle tail feathers arcua¬ 
ted ; wings short, and concave. 
