EXPLANATION OF PLATES VIII & 1X—continued. 
with the corresponding layers of the neurilemma (z m) surrounding the 
nerve-fibre, 
Fig, 4.—Transverse section of Pacinian corpuscle (chloride of gold pre- 
paration, a portion only is represented) ; @ a’, outermost tunics of the corpus- 
cle slightly separated one from another by (artificial) clefts, d; c, imner- 
most tunics, closely arranged around the core, d, At either edge of the 
outer tunics are seen oval nuclei belonging to the flattened cells which 
cover their surfaces. (The fibres within the tunies are not rendered visible 
by this mode of preparation.) 
Figs. 5, 6.—Portions of teazed-out preparations (chromic acid one- 
sixth per cent.). In fig. 5 a portion of three of the tunics is seen as torn 
off transversely to the axis of the corpuscle; in fig. 6 a surface—view is 
shown of a portion of a “capsule,” so-called. c, fine, closely-set fibres, 
seen in fig. 5, to form a layer on either side of the flattened cells, which 
bound the tunics, these themselves being less distinctly seen than in the 
chloride of gold preparation (fig. 4); e, reticulating fibres, stretching across 
the interstitial space of each tunic: the dots represent the broken ends of 
some of the fibres. In fig. 6 the oval nuclei, ~, of the layer of epithelioid 
cells are seen (the cell outlines are not visible); over these the continuous 
Jayer of delicate transversely arranged fibres, c, and, finally, the more 
strongly marked reticulating fibres, e, 
Most of the figures represent the parts very highly magnified, but none 
are drawn to scale. Figs. 1 and 2 were drawn under a power of about 600 
diameters; fig, 2a, of 1000 diameters; fig. 3 of about 200; fig. 4, of 
about 400; and figs. 5 and 6 under a power of about 800 diameters. 
For the high powers Hartnack’s immersion lenses were employed. 
