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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1866 Excerpt: ...The second or maxillary division quits the third on entering the floor of the orbit, along which it curves, sending from its concavity filaments to the lacrymal glands, and dividing into two chief branches; the internal branch, answering to the spheno-palatine and suborbital, supplies the palate and floor of the nasal cavity, and emerging at the fore-part of the orbit, it spreads upon the maxillary tegument: the external branch passes along the floor of the orbit, and emerges upon the face. The third or ' mandibular' division descends at the back-part of the orbit, in front of the tympanic bone, supplies the temporal and pterygoid muscles, enters the mandibular canal, and distributes branches inwardly to the tongue and floor of the mouth, outwardly to the mandibular follicles and tegument. In the Frog the maxillary and mandibular divisions of the trigeminal, arising distinctly from the ganglion, diverge to their respective destinations at the middle of the floor of the orbit: the hindmost branch, continuous with a filament from the acoustic nerve, unites with a branch of the vagus, and is distributed like the 'portio dura' of the 'seventh' nerve. The distinct origin of this nerve, between the 'fifth' and acoustic, is shown in the Python, fig. 188, 8; it communicates, fig. 206, 6, with the ganglion, ib. 1, of the sympathetic, then passes through the 'apertor oris, ' to which it gives a branch; communicates with the first spinal nerve, and terminates on the 'costo-mandibularis' muscle. The acoustic nerve, fig. 188, 9, soon divides, and enters the labyrinth by two or more foramina. The glosso-pharyngeal, fig. 188,10, is distinct at its origin in Serpents and higher Reptiles. In Batrachia it issues from the ganglion of the vagus. In the Python the glosso-pharyng...

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