1/2 Journal of Comparative Neurology. 



ings, with the nerve fibers going to them, as some of our figures 

 may show. The capsules of the spindles are in this way not 

 shown and the intrafusal fibers only faintly seen. 



Motor endings in stnped muscle. It is not our purpose to 

 give a full review of the literature bearing on the motor end- 

 ings in striped muscle tissue. This has been so well done in 

 the writings of Krause, Kiihne and Ranvier that such a sum- 

 mary is here uncalled for. Mention may however be made of 

 the fact that Doyere, as early as 1840, discussed the endings of 

 nerves in striped muscle of insects ; describing a granular ex- 

 pansion of the nerve which seemed to be glued to the muscle 

 substance, and which was found under the sarcolemma ; the 

 term '' Doyere'' s elevation" covnts from this account. Kiihne 

 discovered in 1862 the branched ending of the axis-cylinder in 

 frog's muscle. In the same year, Rouget described an end- 

 plate, which was said to be under the sarcolemma. This was 

 regarded as the expanded end of the nerve fiber, its nuclei sim- 

 ilar to the nuclei found in the nerve sheath. Rouget's obser- 

 vations were made on reptilia, birds and mammals. Further 

 advance was soon made by Krause, who observed that the axis 

 cylinder did not form the end-plate by its expansion, but term- 

 inated in a number of pale fibers, in a fibrillar, nucleated cap- 

 sule, which was regarded as an expansion of the nerve sheath 

 and which was outside of the sarcolemma. A much more ac- 

 curate account, as we now know, was given by Kuhne in 1864, 

 where, especially in his later communication, he states that the 

 nerve ending is under the sarcolemma. the nerve sheath becoming 

 continuous with the muscle sheath. And further states that the 

 myelin stops abruptly, while the axis cylinder divides into a 

 number of branches, which terminate in an elevation on the 

 muscle fiber. In his classical research, which appeared in 1887, 

 Kiihne says that at the point of innervation of a striped muscle 

 fiber, the following structures are to be recognized : 



1. The telolemma with its granular nuclei. 



2. The branches of the axis cylinder — "Das Geweili." 



3. The sole {'' Die Sohle"), consisting of a granulosa 

 with large transparent nuclei. 



