. The development of the chick; an introduction to embryology. Birds -- Embryology. 82 THE DEVELOPMENT OF THE CHICK of the notochord remains attached to the entoderm for a consid- erable period after the formation of the head-fold. A longitudinal section shows the head-process as an appendage to the anterior end of the primitive streak, or the primitive knot (Fig. 42).. 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 Lillie
. The development of the chick; an introduction to embryology. Birds -- Embryology. 82 THE DEVELOPMENT OF THE CHICK of the notochord remains attached to the entoderm for a consid- erable period after the formation of the head-fold. A longitudinal section shows the head-process as an appendage to the anterior end of the primitive streak, or the primitive knot (Fig. 42).. 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 Lillie, Frank Rattray, 1870-1947. New York, Holt
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