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64 



OENITHOLOGISTS' COMPENDIUM. 



Apple Green, n. A very light yellowish green color. (Light green 

 zinnober -|- lemon yellow + white.) (Plate X. fig. 20.) 



Aquat'ic (L. aqua'ticus), a. Pertaining to the water. Aquatic birds are 

 those which derive their subsistence chiefly from seas, lakes, or 

 rivers, and include two artificial groups known as " Waders " and 

 " Swimmers." 



Aq'uiline (L. aquili'nus), a. Eagle-like. 



Arbo'real, 1 (L arbf/reu8 \ a> Tree-inhabiting. 



Arbor icole, ) 



Arcu'ate (L. arcua'tus), a. Bow-shaped ; arched. 



Are'olae (L. pi. of are'ola), n. The small naked spaces between the scales 

 of the feet, usually called interspaces. 



Arie'tiform (L. arie'tiform'is), a. Having the form of the zodiacal sign 

 Aries, T. (PlateXV.fig.il.) 



Armil'la (L.), n. A colored ring round the lower end of the tibia; an 

 anklet. 



Articulation, n. A joint or hinge. (Usually applied to the limbs.) 



Ash-color (L. cine'reus), n. (See Cinereous.) (Plate II. fig. 16.) 



As'ter Purple, n. A rich clear purple color, like some varieties of the 

 aster. (Winsor & Newton's intense blue, or Schoenf eld's violet madder 

 lake -f Bourgeois's "rose tyrien.") (Plate VIII. fig. 8.) 



Asymmetrical, a. Without symmetry, or without close resemblance 

 between corresponding parts, as opposite sides. (The pattern of 

 coloration in partial albinos is often asymmetrical.) 



Asym'metry, n. Disproportion, or want of close resemblance, between 

 corresponding parts or organs. (Very decided asymmetry of opposite 

 sides of the skull is observable in some Owls. J 



At'rophy, n. The wasting away, or obliteration, of an organ or part 

 through deficient nutrition. 



Atten'uate (L. attenua'tus), a. Tapering or growing gradually narrower 

 toward the extremity, but not necessarily pointed (which would be 

 acuminate). 



Auric'ular (L. auricula' ris), a. Pertaining to the ear. 



Auric'ula Purple, n. A deep but rather dull purple, like the color of 

 the purple auricula. (Schoenfeld's violet madder lake, or Winsor 

 & Newton's violet carmine.) (Plate VIII. fig. 3.) 



Auric'ulars (L. re'gio auricula' ris), n. The (usually) well-defined feathered 

 area which conceals the ears in birds. (Plate XL) 



Autoptical, a. Personally inspected. 



Autum'nal Plu'mage (L. ves'tis autumna'Us), n. The full dress of 

 autumn. In most birds it remains essentially unchanged till the spring 

 moult. In many species the young possess a peculiar autumnal plu- 

 mage (assumed by their first moult) which differs not only from their 

 first livery but also from that of adults at the same season. In such, 

 the adult or mature plumage may be completely assumed at the next 

 moult, or it may be gradually acquired by successive moults, as in the 



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