. Elementary text-book of zoology. RAIA. 323 Utriculus. y Ampulla. The auditory nerve is simple and short and passes to the auditory capsule. If the jugular sinus be cut Fig. 230. âThe Ear (Mem- open throughout its length uranous Labyrinth) of the the glossopharyngeal (IX.) Skate (Diagrammatic), and vams (X.) nerves will ^ . â 1 T_ J rTM i-«r^T_ bemi-circular Canal, easily be exposed. I he IXth is simple and passes from behind the auditory capsule to the first gill-slit. The vagus (X.) has four branchial branches to the four last gill-slits, a lateral line branch under the skin and a visceral
. Elementary text-book of zoology. RAIA. 323 Utriculus. y Ampulla. The auditory nerve is simple and short and passes to the auditory capsule. If the jugular sinus be cut Fig. 230. âThe Ear (Mem- open throughout its length uranous Labyrinth) of the the glossopharyngeal (IX.) Skate (Diagrammatic), and vams (X.) nerves will ^ . â 1 T_ J rTM i-«r^T_ bemi-circular Canal, easily be exposed. I he IXth is simple and passes from behind the auditory capsule to the first gill-slit. The vagus (X.) has four branchial branches to the four last gill-slits, a lateral line branch under the skin and a visceral branch which passes to the heart and stomach. The spinal cord gives off paired spinal nerves, the by kd'uct"to the ; first fifteen (or 15 to 18) of which join together to form the brachial plexus, passing to the pectoral Lagena, . / Horizontal Semi-circular Canal. Sacculus. Note that there is no middle or outer ear, and that the inner ear communicates We may summarise the cranial nerves as follows :- FORE-BRAIN. MID-BRAIN. I. Olfactory. II. Optic. III. Oculomotor. IV. Trochlear. V. Trigeminal. Part of oi)hthalmicus superficialis. 1. Ophthalmicus profun- dus. 3. Maxillary. 4. Mandibular. VI. Abducens. HIND BRAIN. VII. Facial. Part of ophthalmicus superficialis. Hyomandib ular. Outer buccal* Inner buccal, t Palatine (and spiracular). pre- VIII. Auditory. IX. Glossopharyngeal. X. Vagus. 1. Four branchials. 2. Lateral line. 3. Visceral. * The branches in italic type disappear in Vertebrata above the fishes, besides parts of other branches. t The maxillary anast-'moses to some extent with the inner buccal nerve, but whether fibres of V. actually supply the ampullee at the termination of the inner buccal is 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 Masterman, Arth
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