560 



GLOSSARY. 



Vexil'lum, n. Rhachis and web of a feather 

 taken together ; all of a feather excepting 

 calamus. 



ViBRis'sA, 71. ; pi. vibrissas. Bristly or bristle- 

 tipped feather about the mouth of a bird. 



Vic'tus, n. Food ; diet. 



Vil'li, 11. pi. Soft papulous projections of 

 membrane. 



Vis'cEKAL, a. Pertaining to the viscera. 



Vis'cus, n. ; pi. viscera. Any interior organ of 

 the body, but especially of the digestive sys- 

 tem. The stomach is a viscus ; the intestines 

 are viscera. 



Vi'sus, n. Vision ; eyesight. 



Vi'telline, a. Pertaining to the vitellus. 



Vi'TELLiNE Mem'brane, 71. An envelope of the 

 vitellus. 



Vitel'lus, n. Yolk (which see). 



Vit'heous, a. Glassy ; said of the humor in 

 the back chamber of the eye. 



Vit'ta, n. Broad band of color. 



Vo'mer, n. A bone of the skull, lying at the 

 base, in the median line, in advance of the 

 sphenoid. Also, the peculiarly shaped and 

 enlarged last bone of the tail, or pygostyle. 



W. 



Washed, a. As if overlaid with a thin layer 



of different color. 

 Wat'tle, n. A naked, fleshy, and usually 



wrinkled and highly colored skin hanging 



from the cliiu or throat, as in the cock and 



turkey. 

 Web, n. The vane of a feather, on either side 



of the rhachis. 

 Wedge-shaped, a. See Cuneate. 



Whis'kered, a. Having lengthened or bristly 



feathers on the cheeks. 

 Wing, n. (73. ) See Ala. 

 Wing, Bend of. (77.) See Flexura. 

 Wing-coverts, n. pi. (83.) See Tectrices. 

 Wolff'ian Bodies, n. Certain organs of the 



embryo associated with the uro-genitals. 



Xi'phoid, a. or n. Sword-shaped. Posterior 

 prolongation of the sternum. 



Y. 



Yolk or Yelk, n. "Yellow" of an egg; a 

 soft, opaque, yellow globular mass, enveloped 

 in a proper membrane (the vitelline) and sus- 

 pended in the white by the chalaza;. It has a 

 central cavity full of a clear substance, fur- 

 nished with a duct leading to a mass of cells 

 termed. proligerous disc ; adhering to its surface 

 is the cicatricxdum, or " tread," which becomes 

 the embryo. 



Zo'na Pellu'cida, n. Consolidated membra- 

 nous envelope of the primitive ovum. 



Zoology, n. Natural history of animals, of 

 which ornithology is one department. 



Zygapoph'ysis, a. Articular process of a ver- 

 tebra. 



Zygodac'tyle, a. Yoke-toed ; having the toes 

 in pairs, two before and two behind. 



Zygo'ma, 71. Malar bone and its connections. 



Zygomat'ic, a. Pertaining to the malar bone. 



