THE NERVOUS SYSTEM. 



75 



which terminates in corpuscles of various shapes, with a capsule containing 

 a transparent or striated mass, in the centre of which terminates the axis- 

 cylinder of the nerve-fibre, the ending of which is somewhat clubbed 

 (Fig. 230). 



(3.) Touch corpuscles (Fig. 229) are found in the papillae of the skin 

 or among its epithelium; they may be simple or compound; when simple 

 they are large and slightly flattened transparent nucleated ganglion cells 



FIG. 309. FIG. 310. 



FIG. 309. Extremities of a nerve of the finger with Pacinian corpuscles attached, about the 

 natural size (adapted from Henle and KollikerX 



FIG. 310. Pacinian corpuscle of the cat's mesentery. The stalk consists of a nerve-fibre (N) with 

 its thick outer sheath. The peripheral capsules of the Pacinian corpuscle are continuous with the 

 outer sheath of the stalk. The intermediary part becomes much narrower near the entrance of the 

 axis-cylinder into the clear central mass. A hook-shaped termination with the end-bulb (T) is seen 

 in the upper part. A blood-vessel (V) enters the Pacinian corpuscle, and approaches the end-bulb : it 

 possesses a sheath which is the continuation of the peripheral capsules of the Pacinian corpuscle. 

 X 100. (Klein and Noble Smith.) 



enclosed in a capsule; when compound the capsule contains several small 

 cells. The corpuscles of Grandry form another variety, and have been 

 noticed in the beaks and tongues of birds. They consist of corpuscles oval 

 or spherical, contained within a delicate nucleated sheath, and containing 

 several cells, two or more compressed vertically. The cells are granular 

 and transparent, with a nucleus. The nerve enters on one side, and laying 

 aside its medullary sheath, terminates in or between the cells. 



