THICK-KNEE. GRALLATORES. (EDICNEMUS. 253 



and thighs white. Neck, and upper part of breast, yel- 

 lowish-white, streaked with brown. Lesser wing-coverts 

 pale cream-white. Quills black, the first having a large 

 white bar near the middle, the second with one rather 

 smaller. Tail wedge-shaped, the three outmost feathers 

 reddish-white, with arrow-shaped bars and a broad tip 

 of black, the next two feathers more inclining to wood- 

 brown, with a few darker zigzag lines and variegations, 

 and with black tips ; the two middle feathers pale 

 wood-brown, slightly marbled, but without the black 

 tips. The horny point of the bill black, the basal part 

 being primrose-yellow. I rides gamboge-yellow. Be- 

 hind the eyes is a bare space of a wax-yellow colour. 

 Legs and toes yellow, with a greyish tinge. Claws 

 blackish-brown. 



The female resembles the male bird ; and the young are 

 distinguished by the colours being less marked and dis- 

 tinct, and the tarsus below the joint being thick and 

 swollen. 



ORDER V. 

 NATATORES. 



THIS Order, which constitutes the fifth great division of 

 the Class, contains (as the title imports) all the various tribes 

 conspicuous for their aquatic habits ; and whose conforma- 

 tion, as to the structure of the feet and other anatomical 

 points, fits them for swimming, diving, &c., and entitles 

 them to the appropriate name of Water-Fowl. It answers 

 to the Palmipedes of other systematists, if we except a few 

 forms, which it has been found necessary (in strict accordance 



