148 



NERVOUS TISSUE. 



or at their roots (fig. 100) ; also, more deeply, in the skin of the glans 

 of the penis and clitoris.* 



Fiff. 100. 



Fig. 100. — End-Bulbs in Papilla, magnified, 



TREATED WITH ACETIC ACID. 



A, from the lips ; tlie wliite loops in one of 

 tliein are capillaries. B, from the tongue. Two 

 end-bulbs seen in the midst of the simxjle papilltfi. 

 a, a, nerves (from KoUiker). 



Tactile coi'puscles or touch-bodies {coiyuscida tactus) (fig. 101). 



Fig. 101. 

 B . C f- A 



Fig. 101. — Papill.?: from the Skin of the Hand, freed from the Cuticle 



AND exhibiting THE TACTILE CORPUSCLES. MAGNIFIED 350 DIAMETERS. 



A. .^iinple paiiilla with four nerve-fibi'es. a, Tactile corpuscle ; h, nerves, b. Papilla. 

 treated ^\•ith acetic acid ; «, connective tissvie of papilla with cells and line elastic fila- 

 ments ; h, tactile corpuscle with transverse nuclei ; c, entering nerve with neurilemma 

 or perineurium ; d, nerve- fibres winding round the corpuscle, c. Papilla viewed from 

 above so as to appear as a cross section, a, connective tissue of papilla ; h, nerve-fibre ; 

 c, slieatk of the tactile corpuscle containing nuclei ; d, core (after KoUiker). 



Discovered b}^ E. Wagner and Meissncr. These are mostly of an oval 



* W. Krause has described peculiar organs in the skin of the penis and clitoris, allied 

 to the end -bulbs, which he proposes to call (jcnital ncrve-mrpusdcs. They are various in 

 form, but present a mulberrj'-like surface. One, or two, rarely three or four, dark- 

 bordered nei-ve fibres enter each of them. They have a delicate sheath of connective 

 tissue, with many nuclei, and soft finely granular contents allied to the core of the end- 

 Lulbs, 



