148 MANUAL 



Cleft, cut into, (incised.) 



Coalesce, to join together. 



Coccyx, the last bone of the tail. 



Combx, — of fowl, etc, — fleshy outgrowths, fleshy head crests. 



Commissure, the angle of the mouth behind (when the bill is 

 open), often [wrongly] applied to the whole edge from 

 tip of mandible to the angle. 



Compressed, flattened in a perpendicular direction. 



Concave, hollowed toward the centre. 



Conical, cone-shaped. 



Conirostres, birds in which the l)ill is conical (sparrow-like). 



Contour, the shape, outline, or outward form of anything. 



Contracted, suddenly grown or made smaller in any direction. 



Convex, swelled or bulged from the center outward. 



Coriaceous, tough like leather. 



Corneous, hard and horny. 



Corrugated, roughened, wrinkled. 



Coverts, small feathers covering the base of some growths of 

 larger feathers : there are the primarij coverts, the sec- 

 ondary coverts, and the tertiary coverts ; the greater cov- 

 erts and the lesser coverts ; the upper coverts and the 

 under coverts, etc. 



Crenulate, wavy edged. 



Crest, a portion of the feathers of the body which are, (being 

 somewhat elongated) or are capable of being, raised 

 above the surface of the surrounding feathers. Crests 

 properly belong to the head. 



Crissuin, the region between the anus and the base of the un- 

 der tail coverts. 



Crown, of the head, the central portion. 



Cms, that portion of the leg represented by the tihia and the 

 fibula taken together. 



Culmen, the highest median line of the upj)er mandible. 



Culmincde, where the upper edges of any thing join each other. 



Cultirostres, birds in which the bill is of a cutting, knife- 

 shaped shape (Heron-like). 



