XXXIV.] 



NERVES OF SKIN. 



379 



solution. A medullated nerve-fibre surrounded by perineurium 

 passes to each corpuscle. The lamellae of the perineurium become 



FIG. 349. Pacini's Corpuscle, from Mesen- 

 tery of Cat. c. Capsules ; d. Endothe- 

 lial lining separating the latter; n. 

 Nerve ; /. Funicular sheath of nerve ; 

 m. Central mass ; n'. Terminal fibre ; 

 and a. Where it splits up into finer 

 fibrils. Examined in fresh normal 

 saline. 



FIG. 350. Endothelium of 

 Lamellae of a Pacinian 

 Corpuscle. Silver nitrate. 



continuous with the lamellae of the corpuscle, and the nerve still 

 provided with its my el in and sur- 

 rounded by its endoneurium pierces 

 the lamellae and reaches the central 

 part of the corpuscle. The endoneurium 

 seems to form a soft core round the axis- 

 cylinder, which usually splits up at the 

 further end into a tuft of fibrils (fig. 



349)- 



5. T.S. Pacinian Corpuscles. They 



lie in the subcutaneous tissue. In a 

 V.S. of foetal skin from the palmar 

 surface of a digit (Lesson XXIX. 5) it FIG. 35 i.T.s. Pacinian Corpuscle, 



. i , i IT . i T 1 Foutal Skin. 



is easy to find these bodies cut obliquely 



or transversely. Fig. 351 shows their appearance when cut trans- 

 versely. Harden the skin in alcohol or osmic acid. Stain in picro- 

 carmino or hsematoxylin. 



6. Herbst's Corpuscles (H) are modified Pacinian corpuscles, 

 occurring in the mucous membrane of the tongue of the duck. They 

 lie in the corium, just under the epidermis. Harden the tongue or 

 bill as for tactile corpuscles (p. 378), or use absolute alcohol, and 

 stain the tissue in bulk with borax-carmine. Mount in balsam. 



