278 LIST OF MICROSCOPICAL SPECIMENS. 



.No. of diameters 



No. magnified, 



of the dark-bordered nerve-fibres as fine pale 

 fibres with nuclei in the intervals can be clearly 

 demonstrated in this specimen. Kolliker thinks 

 these soon cease and thus form ends, page 250, 

 but in my specimens they may be followed much 

 further than Kolliker succeeded in tracing them, 

 and observations upon other muscles of the same 

 animal render it certain that these very fine nu- 

 cleated fibres come into close contact with the 

 sarcolemma and ramify over every part of the 

 surface of the elementary fibre . . . . . . 220 



119. Ultimate division of dark -bordered fibre into pale 



fibres, which ramify on sarcolemma. Elementary 

 muscular fibre ; pectoral, frog .. .. .. 215 



120. Fine pale nerve-fibres distributed to striped mus- 



cle ; auricle of frog's heart. The ganglion cells 



are also seen . . . . . . . . . . . 215 



121. Striped muscle. Distribution of fine nerve-fibres 



in connective tissue of striped muscle ; hyla . . 215 



122. Distribution of bundles of nerves and vessels ; thin 



muscle. Chameleon . . . . . . . . 215 



123. Distribution of finest nerve-fibres to elementary 



muscular fibres. Chameleon. Showing supposed 



' end organs' . . . . . . . . . . 215 



124. Distribution of nerve fibres to the elementary mus- 



cular fibres. Chameleon. The individual mus- 

 cular fibres are separated from one another by 

 more than their diameter so that the finest nerve- 

 fibres can be seen in the intervals between them 

 and traced over or under them without difficulty. 

 In this specimen many of the so-called 'nerve- 

 tufts,' or ' end organs,' can be discerned, but in 

 almost every instance more than one individual 

 nerve-fibre can be traced to the tuft. It seems 

 more probable that the tuft consists of continuous 

 fibres, much coiled and convoluted, than that it 

 is a terminal organ connected with the end of a 

 single nerve-fibre. From every one of these 

 ' nerve-tufts' fibres may be traced and followed 

 for a considerable distance over many muscular 

 fibres beyond. The arrangement will be under- 

 stood if the figs, in plates XII and XIII, pages 

 263, 265, be carefully studied. There are no ends 

 or terminations whatever . . . . . . . . 700 



