H. The Outer Covering (Indumentum).
- 142. Outer covering (Indumentum; Ptilosis). The exterior of the bird in detail.
- 143. Feathers (Plumæ). Composed of the stem and the webs.
- 144. Stem (Scapus). The entire central axis of the feather.
- 145. Quill (Calamus). The hollow horny basal portion of the feather.
- 146. Shaft (Rhachis). The solid terminal portion of the stem in which the fibres are implanted.
- 147. Webs (Pogonia). The series of fibres implanted on each side the shaft, generally stiff, and having little
- 148. Hooks or barbules along the edges, by which adjacent ones interlock; sometimes soft, with the barbules not interlocking, the barbules sometimes wanting. The
- 149. Inner web (Pogonium internum) is situated on the inner side of the shaft; the
- 150. Outer (externum), on the outer side.
- 151. Vane (Vexillum). The shaft and webs taken together, or the portion of the feather left when the barrel or quill is cut away.
- 144. Stem (Scapus). The entire central axis of the feather.
- 143. Feathers (Plumæ). Composed of the stem and the webs.
GLOSSARY.
GLOSSARY OF TECHNICAL TERMS USED IN DESCRIPTIVE ORNITHOLOGY.
Including a number of prominent Anatomical and Physiological Terms.
(Prepared by Dr. Coues.)
Note.—The number in parenthesis refers to the foregoing “Explanation of Terms,” etc. The sign (´) marks accent; n., noun; a., adjective; pl., plural; gen., genitive.