. The elements of Embryology. Embryology. G4 THE FIEST DAY. Fig. 22. [ Surface Vikw of the Pellucid Area of a Blastoderm op 18 hours. None of the opaque area is shewn, the pear-shaped outhne indicating the limits of the pellucid area. At the hinder part of the area isseen the primitive groove pr., with its nearly parallel walls, fading away behind, but curv- ing round and meeting in front so as to form a distinct anterior termination to the groove, about half way up the pellucid area. Above the primitive groove is seen the medullary groove , with the medullary folds A. These diverging
. The elements of Embryology. Embryology. G4 THE FIEST DAY. Fig. 22. [ Surface Vikw of the Pellucid Area of a Blastoderm op 18 hours. None of the opaque area is shewn, the pear-shaped outhne indicating the limits of the pellucid area. At the hinder part of the area isseen the primitive groove pr., with its nearly parallel walls, fading away behind, but curv- ing round and meeting in front so as to form a distinct anterior termination to the groove, about half way up the pellucid area. Above the primitive groove is seen the medullary groove , with the medullary folds A. These diverging behind, slope away on either side of the primitive groove, while in front they curve round and meet each other close upon a curved line which repre- sents the head-fold. The second curved line in front of and concentric with the first is the commencing fold of the 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 Foster, M. (Michael), Sir, 1836-1907. London, MacMillan
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Keywords: ., bookautho, bookcentury1800, bookdecade1880, booksubjectembryology
