. The chordates. Chordata. PULP-^ Fig. 399. Four stages in the development of a feather. (A, B, C) Stages in the development of a down-feather. (D) A contour feather in the feather-sheath. (a-b) and (c-d) are sections of a young contour feather at the levels indicated in (D). (Redrawn from Ihle, after Butschli. Courtesy. Neal and Rand: "Chordate Anatomy," Philadelphia, The Blakiston Company.). Fig. 400. Stereogram of a developing down-feather, (bv) Blood-vessels entering pulp; (c) dermis (corium); (ep) epidermis; (/) feather follicle; (p) pulp (mesen- chyme) of developing feather; (p
. The chordates. Chordata. PULP-^ Fig. 399. Four stages in the development of a feather. (A, B, C) Stages in the development of a down-feather. (D) A contour feather in the feather-sheath. (a-b) and (c-d) are sections of a young contour feather at the levels indicated in (D). (Redrawn from Ihle, after Butschli. Courtesy. Neal and Rand: "Chordate Anatomy," Philadelphia, The Blakiston Company.). Fig. 400. Stereogram of a developing down-feather, (bv) Blood-vessels entering pulp; (c) dermis (corium); (ep) epidermis; (/) feather follicle; (p) pulp (mesen- chyme) of developing feather; (per) periderm; (r) rods of epidermis, which later dry, separate, and form the down. (Courtesy, Kingsley: "Comparative Anatomy of Vertebrates," Philadelphia, The Blakiston Company.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : Blakiston
Size: 2277px × 1097px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollect, bookpublisherphiladelphiablakiston
