108 ORNITHOLOGISTS' COMPENDIUM. 
Segmentation, a. Division into parts or segments. 
Semicircular, a. Divided into one half of a circular figure. (Plate 
XIV. fig. 20.) 
Semilu'nar, a. Shaped like a half -moon. 
Semipal'mate S (L ' semi P alma ' tus )> a - Half-webbed ; having the mem- 
Semipal' mated ) brane between the anterior toes reaching not more 
v ' C than half-way to their ends. 
Se'nile (L. seni'lis), a. Aged; pertaining to old age. 
Se'pia (L.), n. A deep dark brown color, with little red in its composi- 
tion. The pigment called sepia is a carbonaceous matter prepared 
from the natural ink of a species of cuttle-fish. (Plate III. fig. 3.) 
Septum (L.), n. A partition. 
Seri'ceous (L. seri'ceus), a. Silky. 
Ser'rated j serra ' tus )> a - Toothed like a saw. 
Ses'sile (L. ses'silis), a. Resting directly upon an object, without stem, 
or peduncle. 
Seta'ceous (L. seta'ceus), a. Bristly, bristled. 
Se'tae (L.), n. Bristles, or bristle-like feathers. 
Se'tiform (L. setifor'mis), a. Bristle-like. 
Se'vres Blue, n. A very light blue color. (Antwerp blue -f- cobalt blue 
+ white.) (Plate IX. fig. 18.) 
Sex'ual, a. Pertaining to sex. 
Shaft (L. rha'chis), n. The mid-rib of a feather. 
Sib'ilant (L. sibi'lans), a. Hissing. 
Side of neck (L. parauchen'ium), n. The space included between the 
cervix and the jugulum. (Plate XI.) 
Sides, n. The lateral portions of the inferior surface of a bird's body, 
extending from near the armpits to, and including, the flanks. The 
sides are subdivisible into (1) sides of breast, (2) sides proper, and (3) 
flanks. (Plate XI.) 
Sig'moid, a. Shaped like the letter S. 
Sign (L. sig'num), n. Any character or figure used to denote a word. 
As, $ = male; 9 = female; o = young; > (in synonymy) = more 
than; < (in synonymy) = less than ; "? = doubt; ! = certainty, etc. 
Sincipital (L. sincipita'lis) , a. Pertaining to the sinciput, or anterior 
half of the pileum. 
Sin'ciput (L.), n. The anterior half of the pileum. (Nearly synonymous 
with forehead, but denoting a more extensive area, that is, the frontlet, 
forehead, and anterior part of the crown, together.) 
Sinuate, ) (L. sinua'tus), a. Said of a feather when the edge is gradu- 
Sin'uated, ) ally cut away. (Plate XIII. fig. 6.) 
Sky Blue (L. azu'reus; cozru'leus; cceles'tis ; codesti'nus ; coz'lico'lor) , n. 
Azure, or light cobalt blue. (Same as azure.) (Plate IX. fig. 
15.) 
Slate-Black (L. schista'ceo-ni'ger), n. See plate II. fig. 2. 
