. Hand-book of physiology . us, nerve-fibres appear to terminate incertain serous membranes. According to Mr. Eainey ( p. 85), the arachnoid membrane of the brain andspinal cord is traversed by innumerable delicate nerve-fibres,arranged in minute plexuses; and a similar mode of arrange-ment appears to be observed by the nerve-fibres in otherserous membranes, , the peritoneum (Bourgery, xix. 1845;Pappenheim, xviii. 1845). 4. By/ree ends. It is not im-probable that this mode of termination exists in several parts:it is best seen in the Pacinian corpuscles^ and in some of thepapil
. Hand-book of physiology . us, nerve-fibres appear to terminate incertain serous membranes. According to Mr. Eainey ( p. 85), the arachnoid membrane of the brain andspinal cord is traversed by innumerable delicate nerve-fibres,arranged in minute plexuses; and a similar mode of arrange-ment appears to be observed by the nerve-fibres in otherserous membranes, , the peritoneum (Bourgery, xix. 1845;Pappenheim, xviii. 1845). 4. By/ree ends. It is not im-probable that this mode of termination exists in several parts:it is best seen in the Pacinian corpuscles^ and in some of thepapillae of the skin. The Pacinian corpuscles are little elongated, oval bodies,situated on some of the cerebro-spinal and symj^athetic nerves,especially the cutaneous nerves of the hands and feet (figs. 40and 41). They are named Pacinian, after their discoverer, I PACINIAN CORPUSCLES. 385 Pacini.* Each corpuscle is attached by a narrow pedicle to the nerve on which it is situated; it is formed of several con- Fig.
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