. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 538 owing to the changed relations brought about by an elongation of this region, and, in the writer's experience, has only been made possible by a study of wax reconstructions. The determination of the aulages of that portion of the ducts which arises along the ventral surface of the azygos veins, however, is an extremely easy matter and, owing to the simpler relations which exist in the region of the body traversed by these veins, we find here what 1 regard as an indisputable de- monstration of the thoracic and right lympha
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 538 owing to the changed relations brought about by an elongation of this region, and, in the writer's experience, has only been made possible by a study of wax reconstructions. The determination of the aulages of that portion of the ducts which arises along the ventral surface of the azygos veins, however, is an extremely easy matter and, owing to the simpler relations which exist in the region of the body traversed by these veins, we find here what 1 regard as an indisputable de- monstration of the thoracic and right lymphatic ducts in the process of being spHt off from the veins. A transverse section taken through the thoracic region of a 16 mm cat embryo (Fig. 7) ^) shows the position occupied by the thoracic and Right azygos Left iizvgos. Right lymph, duct Aorta Fig. 7. Microphotograph of a transverse section through the thoracic region of a 16 mm cat embryo showing the thoracic and right lymphatic ducts and their relations to the aorta and the azygos veins, right lymphatic ducts with respect to the aorta and the azygos veins. Although the two ducts lie in close contact with the azygos veins they do not, in this nor in older embryos, communicate with them at any point along their course. On comparing Fig. 7 with Figs. 8 and 9, which are microphotographs of two successive sections through the 1) The sections represented by Figs. 7, 8 and 9 were photographed from the anterior surface so that the left azygos vein appears on the right side of the figure. I take this opportunity of thanking my Assistant, Mr. C. F. Silvester, for his kindness in preparing the photographs for this 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 Anatomische Gesellschaft. Jena : G. Fischer
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