OF " NERVE-TUFTS" lA^ BREAST MUSCLE OF FROG. 269 



bodies adhere to the sarcolemma, but are certainly 

 not in. intimate relation -with the contractile material 

 of the muscle. The course of the exceedingly fine 

 nerve fibres of the chameleon can be followed without 

 difficulty oyer perhaps thirty or more muscular fibres 

 and their connection with the nerve bioplasts de- 

 monstrated. The general conclusions I have arrived 

 at fi'om investigating the structure of these bodies 

 accord very closely with those resulting from in- 

 vestigations upon other tissues. 



288. — Of the so-caUed " nerve tufts " in the breast 

 muscle of the frog. — With reference to the nerves 

 supplying the so-called nerve tufts in the breast 

 muscle of the frog, I would remark — 



1. That two dark-bordered nerve fibres, running 

 in the same sheath, may often be traced to one part 

 of the "nerve tuft." 



2. Besides the dark-bordered fibre or fibres, there 

 are invariably very fine fibres running in the same 

 fcheath, 



3. That the dark-bordered fibres and the accom- 

 panying fine fibres divide and subdivide very freely 

 amongst the young muscular fibres, and that thus 

 quite a leash of very fine nerve fibres results, in the 

 course of which numerous nuclei exist at certain 

 intervals. Many of these can be followed upon or 

 between the muscular fibres, for the distance of the 

 twentieth of an inch or more from the oval swelling-. 

 These points were well seen in some of my specimens. 



4. That the dark-bordered fibre or fibres which 

 enter at the tuft are not the only nerve fibres distri- 

 buted to these bundles of muscular fibres, but that 

 invariably a bundle, consisting of two or three fine 

 but dark-bordered fibres, is connected with the mus- 

 cular fibres, at a point above or below that at which 

 the swelling is situated, where the large fibre or 

 fibres enter. Sometimes there are two such bundles, 



