GLOSSARY OF TECHNICAL TERMS. 83 
Hal'lucal, a. Pertaining to the hallux, or hind toe. 
Hallux (L.), n. In birds possessing four toes, the hinder one is the 
hallux, no known bird having four toes directed forwards. In some 
birds, as certain Plovers, the Bustards (Otididce), the Slruthiones, etc., 
the hallux or hind toe is wanting. In three-toed birds having two 
toes in front and one behind, the hallux is usually the one wanting, the 
hind toe being in reality the fourth (or outer) toe reversed. When 
the toes are in pairs (two before and two behind), the hallux is usually 
the inner of the hinder pair, the exception being in the Trogons 
(Trogonidce). The hallux reaches its best development in the Passeres, 
the Accipitres, Strides, and Rallidce, but more especially in the first, 
in which it is usually as strong as if not stronger than the largest of 
the anterior toes. (Plate XL) 
Ham'ulate (L. hamula'tus), a. Furnished with a small hook. 
Ham'ulus (L. ; pi. liam'uli),n. A small hook; sometimes applied to the 
barbules or barbials of a feather, when hook-shaped. 
Hand-quills, n. The Primary quills, or primaries. 
Has'tate (L. hasta'tus), a. Shaped like a spear-head. (Plate XV. fig. 2.) 
Ha'zel (L. coryllin'us ; avellin'us ; avellan' eus) , n. An orange-brown color, 
like the shell of a hazel-nut or filbert ; similar to chestnut, but with 
less red and more yellow. (Vermilion -f- raw sienna -J- black.) (Plate 
IV. fig. 12.) 
Heel (L. suffra'go; calca'neus ; ta'lus), n. The upper posterior extremity 
of the tarsus. (Plate XL) 
Heliotrope Pur'ple, n. A grayish purple color. (Violet madder-lake -f- 
sepia + French blue -f white.) (Plate VIII. fig. 18.) 
Helmet (L. galea'tus), n. A naked shield or protuberance on the top or 
fore part of the head. 
Hepat'ic (L. hepa'ticus), a. Pertaining to the liver ; hence, liver-colored. 
Herodio'nes (L.), n. A natural group of altricial waders, embracing the 
Storks, Wood-Ibises, true Ibises, Spoonbills, Boatbills, and Herons. 
Herodio'nine, a. Pertaining to or partaking of the character of the 
Ilerodiones. 
Her'ring-bone (nwlcings), n. A series of transverse lines or bars con- 
nected along the middle of a feather by a longitudinal stripe or line 
of the same color. (Plate XV. fig. 15.) 
Heterodac'tylae (L.), n. The name of a natural group of birds, including 
only the Trogons. 
Heteroge'neous, a. Of dissimilar nature or miscellaneous character. 
(Opposite of homogeneous.) 
Hex'agon, n. A figure of six sides. 
Hexag'onal (L. hexagona'lis), a. Having six sides. 
Hiber'nal (L. hiber'nus), a. Pertaining to winter. 
Hind-neck (L. cer'vix), n. (See plate XL) 
Hind-toe (L. hal'lux), n. The posterior toe or hallux (which see). (See 
plate XI). 
Hir'sute (L. hirsu'tus), a. Hairy, or shaggy, as the foot of a Grouse. 
