. The anatomical record. Anatomy; Anatomy. 6a Fig. 4 Xo. 3, Huber collection, EmbiyoZ), 10 mm. Reconstructed outline draw- ing of midplane sagittal section of head. Xotochord black. X 10. Fig. 4a Xo. 3, Huber collection, Embrj^o D, 10 mm. Drawing of portion oi vault of pharynx and dorsum of tongue. Xotochord shows distinct loop in contact with pharyngeal epithelium. X 100. Fig. 5 X'o. 406, Mall collection. Embryo E, 13 mm. Reconstructed outline drawing of midplane sagittal section of head. X'^otochord black. X 10. Fig. ha Xo. 406, ^Nlall collection. Embryo E, 13 mm. Drawing shows portion of va


. The anatomical record. Anatomy; Anatomy. 6a Fig. 4 Xo. 3, Huber collection, EmbiyoZ), 10 mm. Reconstructed outline draw- ing of midplane sagittal section of head. Xotochord black. X 10. Fig. 4a Xo. 3, Huber collection, Embrj^o D, 10 mm. Drawing of portion oi vault of pharynx and dorsum of tongue. Xotochord shows distinct loop in contact with pharyngeal epithelium. X 100. Fig. 5 X'o. 406, Mall collection. Embryo E, 13 mm. Reconstructed outline drawing of midplane sagittal section of head. X'^otochord black. X 10. Fig. ha Xo. 406, ^Nlall collection. Embryo E, 13 mm. Drawing shows portion of vault of pharj-nx and dorsum of tongue. Distinct ventral extension of notochord, just over thyroglossal pit in tongue, which is not quite in contact with pharj-ngeal epithelium, a few mesenchymal cells intervening. X 100. Fig. 6 Xo. 4, Huber collection, Embrj'o F, 15 mm. Reconstructed outline drawing of midplane sagittal section of head. X'^otochord black. X Fig. 6a Xo. 4. Huber collection, Embrj-o F, 15 mm. Drawing showing por- tion of vault of pliarynx and dorsum of tongue. Distinct ventral extension of notochord in contact with an evagination of the pharj-ngeal epithelium the anlage of a pharj'ngeal bursa. Further point of contact of notochord and pharyngeal epithelium to the left in figure. X 100. is embraced in one section. The notochord surrounded by a distinct chordal sheath passes obhquely through the caudal portion of the basi- occipital to reach the retropharyngeal region in which region, through its entire course, it is in close relation with the ventral surface of the basi- occipital. Just over the region of the thyroglossal pit in the tongue, the notochord presents a bilobed, ventral extension, which passes obliquely. 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 Bardeen, Charles Russell, 1


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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906