WM 



GLOSSARY OF TECHNICAL TEEMS. 



85 



Hypopti'lum (L.), n. An accessory plume, attached to the barrel or 



stem of ordinary feathers, excepting always the remiges and rectrices. 



(Essentially the same as after-shaft.) 

 Hypora'dii (L. ; pi.), "• Barbs of the hypotilum, or after-shaft. 

 Hyporrha'chis (L.), n. The after-shaft, or stem of the accessory plume, 



or hypoptilum. 

 Hypoth'esis, n. A reasonable presumption to account for what is not 



understood, and hence to be distinguished from theory, based upon 



known facts. 

 Hypothetical, a. Eeasonably presumptive, or probable, though assumed 



without proof. 



I. 



Identification, n. The determination of the species to which a given 



specimen belongs. 

 Identify, v. To determine the systematic name of a specimen. 

 Igno'ble (L. igno'bilis), a. Said of certain Hawks used in falconry. Tech- 

 nically, applied to the short-winged Hawks (that is, the Goshawk and 



Sparrowhawk), to distinguish them from the noble Ealcons (that is, 



true Falcons). 

 H'iac (L. ili'acus), a. Pertaining to the flanks. 



Im'bricate, ) (L. imbrica'tus) , a. Overlapped, like shingles upon a 

 Im'bricated, ) roof. 

 Immac'ulate (L. immacula'tus) , a. Entirely free from spots or other 



markings. 

 Immature', a. Not adult. 



Imperforate (L. imperforatus), a. Not pierced through. 

 Incised' (L. inci'sus), a. Cut out; cut away. 

 Incuba'tion, n. The act of sitting on eggs in order to hatch them. 

 Incum'bent (L. incum'bens), a. Laid at full length. (Said of the hallux, 



or hind toe, when inserted on a level with the anterior toes.) 

 Indent'ed (L. indenta'tus), a. Notched along the margin with a different 



color. 

 In'dian Pur'ple, n. A very dull purple color, like the pigment of the 



same name. (Madder-carmine + intense blue -f- black.) (Plate VIII. 



fig. 6.) 

 In'dian Red, n. A fine rufous-red color, of a slightly more purplish tint 



than the pigments called Light Red and Venetian Red. Same as 



brick red. (See plate IV. fig. 11.) 

 In'dian Yel'low, n. A very intense, rich yellow color, much deeper than 



gamboge, but less pure than cadmium. (Plate VII. fig. 5.) 

 Indig'enous, a. Native of a country. 

 In'digo Blue (L. indlgo'ticus), n. A dark dull blue color, like the indigo 



of commerce. (Plate IX. fig. 1.) 





