82 



THE ESSENTIALS OF HISTOLOGY 



a 



FIG. 101. END-BULB FROM THE HUMAN 

 CONJUNCTIVA. 



a, nucleated capsule ; b, core, the outlines of 

 its cells are not seen ; c , entering fibre, 

 branching, and its two divisions passing to 

 terminate in the core at d. 



FIG. 102. TACTILE CORPUSCLES FROM THE 

 DUCK'S TONGUE. 



A, composed of three cells, with two interposed 

 disks, into which the axis-cylinder of the nerve, 

 , is observed to pass; in'B there is but one 

 tactile disk enclosed between two tactile cells. 



FIG. 103. MAGNIFIED VIEW OF A 

 PACINIAN BODY FROM THE CAT'S 

 MESENTERY. 



s, stalk with nerve-fibre passing to the 

 corpuscle. One or two capillaries are 

 also seen issuing from it between the 

 tunics. 



n 



FIG. 104. PART OF PACINIAN BODY. SHOWING 

 THE NERVE-FIBRES ENTERING THE CORE. 

 FROM AN OSMIC ACID PREPARATION. 



ms, entering nerve-fibre, the medullary sheath of 

 which is stained darkly, and ends abruptly at the 

 core ; ps, prolongation of primitive sheath, passing 

 towards the outer part of the core; c.f. axis-cylin- 

 der passing through the core of the central fibre ; 

 e, some of the inner tunics of the corpuscle, enlarged 

 where they abut against the canal through which 

 the nerve-fibre passes the dots within them are 

 sections of the fibres of which they are composed ; 

 )(. nuclei of the tunics: n', nuclei of the endo- 

 neurium, continued by others in the outer part of 

 the core. 



