66 ORNITHOLOGISTS' COMPENDIUM. 
Bino'mial, 
Bino'minal, 
Berlin' Blue, n. A deep dark blue color, rather lighter and less purplish 
than marine blue. (Schoenf eld's Berlin blue.) (Plate IX. fig. 4.) 
Beryl Green (L. beryli'nus), n. A light bluish green similar to verdigris, 
but more bluish. (Dark permanent green + Schoenfeld's " licht 
blau.") (Plate X. fig. 14.) 
Bev'elled, a. Having two plane surfaces joining obliquely. 
Bev'y, n. A flock of quails or partridges. 
Bi- (in composition). Twice; double. As bicolored (two-colored), biped 
(two-footed), bifurcate (double-forked), etc. 
Bibliography, n. Condensed history of the literature of a subject. 
Bice Green, n. A yellowish green color, lighter and more yellow than 
parrot green. (Light zinnober-green -f lemon-yellow.) (Plate X. 
fig. 10.) 
Bi'colored (L. bi'color), a. Two-colored. 
Bifur'cate (L. bifurca'tus), a. Doubly forked. 
a. Two-named, or, more properly, named by two terms. 
The binomial system of nomenclature, instituted in 1758 
by Linnaeus, and adopted by zoologists and botanists, 
promulgates the use of two terms as the name of each 
species, — the first generic, the second specific. 
Biol'ogy, n. The study of living beings with relation to the laws and 
results of their organization. 
Biological, a. Pertaining to Biology. Biological science embraces the 
study of all organic creations, and thus includes Zoology and Botany, 
both recent and fossil. 
Bis'tre, n. A dark brown color somewhat more reddish than sepia, but 
much less so than burnt umber. (Plate III. fig. 6.) 
Boat-shaped (L. cymbifo/mis), a. A boat-shaped tail has the opposite 
sides, or halves, meeting below along the median line, the outer edges 
being elevated. The tail of Quiscalus (Boat-tailed Blackbird) is afamil- 
iar example, while that of the domestic fowl (Gallus bankiva) exempli- 
fies the opposite form, with the edges below and the middle feathers 
forming the ridge instead of the keel. A boat-shaped bill is one in which 
the maxilla resembles an inverted boat, as in the genus Cancroma. 
Boot, n. In birds, the tarsal envelope, when entire. 
Boot'ed (L. oerea'tus), a. A booted tarsus has the usual scales fused so 
as to form a continuous or uninterrupted covering. The tarsus of the 
smaller Thrushes and the American Robin {Merula migratoria) well 
illustrates this character. 
Bor'dered (with) (L. limba'tus), a. Having the edge or margin all round 
of a different color. 
Bo'real (L. borea.'lis), a. Northern. 
Boss, n. A knob or short rounded protuberance. 
Bottle Green, n. A dark green color like the color of some varieties of 
glass. (Schoenfeld's "dark zinnober-green" or Winsor & Newton's 
Prussian green -j- Winsor & Newton's " olive-green.") (Plate X. fig. 1 .) 
