GLOSSARY OF TECHNICAL TERMS. 87 
I'ris, n. The (usually) colored circle of the eye surrounding the pupil. 
(Plate XII. fig. 11.) 
Isabel'la-cd'or (L. isabelli'nits) , n. A light grayish cinnamon color, or 
light buffy brown. (Raw umber + raw sienna + white.) (Plate 
III. fig. 23.) 
Isopo'gonous, a. Having the two webs equal in breadth. 
Istb/mus, n. A narrow strip, or neck, connecting two larger areas. 
Jug'ular (L. jugula'ris), a. Pertaining to the jugulum. 
Jug'ulum (L.), n. The lower throat or foreneck, immediately above the 
breast. It is a well-defined area in the Hawks, Vultures, Pigeons, 
Ducks, and some other groups. (Plate XI.) 
K. 
Kid'ney-shaped (L. renifor'mis), a. Somewhat heart-shaped, but without 
the point, and broader than long. (See reniform, plate XIV. fig. 19.) 
Knee, n. Properly the femoro-tibial joint, concealed in most birds ; but 
usually the tibio-metatarsal articulation, or heel, is so called. 
Lac'erate (L. lacera'tus), )a. Jagged, or slashed at the end or along 
Lacin'iate (L. lacinia'tus), ) the edge. 
Lach'rymal {bone), n. A large bone bounding the orbit anteriorly and 
above ; it is especially well-developed in certain Falconidce. 
Lacus'trine (L. lacus'tris), a. Lake-inhabiting. 
Lake Red, n. A purplish red color, not so intense as crimson. (Medium 
tint of madder-carmine.) (Plate VII. fig. 2.) 
Lamb'doid, a. L-shaped. 
Lamelliros'tral (L. lamelliros'tris) , a. Having a lamellate bill. 
Lamelliros'tres (L.), n. A group of birds embracing the Anatidce and 
Flamingoes, in which the bill is lamellate-edged. 
Lam'ina, ) ^ ^ A tMn , ^ Qv 
Lamel la, ) 
Lam'inate (L. lamina'tus), 
Lam'ellate (L. lametta'tus), 
Lan'ceolate (L. laneeola'tus), a. Lance-shaped ; tapering gradually to 
a point at one end, and more abruptly at the other. (Plate XIV. 
fig. 12.) 
a. Plated, or scaled. 
