. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. Fig. 11. Sagittal section showing the relation of the primary olfactorius to the an- terior head cavity a ect ectoderm. V trigeminus. JV trochlearis. c. g. ciliary ganglion. / olfactorius. n nasal epithelium, opt optic vesicle, a anterior head cavity. 2 mandi- bular cavity. Fig. 12. Sagittal section through the Anlagen of the anterior cranial nerves. / olfactorius. th „thalamicus". IV trochlearis. V trigeminus. VII facialis, aud audi- tory vesicle. neur neuromeres. hr brain, opt optic vesicle, c. g. ciliary ganglion. 2 m
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. Fig. 11. Sagittal section showing the relation of the primary olfactorius to the an- terior head cavity a ect ectoderm. V trigeminus. JV trochlearis. c. g. ciliary ganglion. / olfactorius. n nasal epithelium, opt optic vesicle, a anterior head cavity. 2 mandi- bular cavity. Fig. 12. Sagittal section through the Anlagen of the anterior cranial nerves. / olfactorius. th „thalamicus". IV trochlearis. V trigeminus. VII facialis, aud audi- tory vesicle. neur neuromeres. hr brain, opt optic vesicle, c. g. ciliary ganglion. 2 mandibular cavity. In my former paper I called the posterior of these nerves the „thalamic", because of its origin between the thalamencephalon and the mesencephalon. The anterior root is the primary Anlage of the ol- factorius. This branch of the anterior nerve complex takes its origin in a large mass of ganglion cells which are proliferated from the margin of the neuropore (fig. 8 J), and which fuse laterally with the thickened ectoderm that, at either side of the neuropore, forms the Anlage of the nasal epithelium. Later the primary attachment to the brain is lost, and a secondary connection between the brain and the fused ectodermic and ganglionic cells is acquired. The olfactorius thus con- forming to the type for sensory nerves. The „thalamic" nerve bears no ganglionic enlargement other than the ciliary ganglion to which it passes after uniting with the primitive olfactorius. I am therefore inclined to think the ciliary ganglion the proper ganglion of 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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