Huber-DeWitt, Neuro-tefidmous End-organs. 163 



bats, numerous nerves spreading out superficially. In larger 

 tendons of man, tendo Achillis, tendon of quadriceps extensor 

 and central tendon of diaphragm, the nerves enter with the 

 blood vessels. In fascias, tendinous sheaths, and synovial 

 sheaths, he had discovered no nerves. 



Golgi's observations extended over those made on the ten- 

 dons of man and several other mammals (rabbit, dog, cat and 

 mouse), birds (sparling, finch and swallow), amphibia (frog) and 

 reptilia (lizard). For reasons above given, they will be consid- 

 ered somewhat fully. 



In the lizard, tendon endings were found by Golgi in mus- 

 cles of the anterior and posterior extremity and in several small 

 tendons belonging to muscles of the vertebral column and tail. 

 The endings were found near the muscular end of the tendon. 

 The nerve fibers terminating in tendon could usually be dis- 

 tinguished from the motor fibers ; the former could usually be 

 traced for long distances in one direction, branches being given 

 off at relatively long intervals, often at right angles. When 

 the nerve fibers reach the transition zone between muscle fibers 

 and tendon, they send off branches at quite regular intervals, 

 which may, after a short course, lose their medullary sheath, 

 and terminate in the ending or may divide into secondary and 

 tertiary branches before losing the medullary sheath, each 

 branch presenting its own ending. The end-apparatus is de- 

 scribed as follows : The axis cylinder, after losing its medul- 

 lary sheath, divides into two, three or four branches ; each of 

 these branches gives off in various directions numerous other 

 fibrils, which again divide into branches of utmost fineness, 

 which anastomose and intertwine forming a network with irreg- 

 ular meshes, at the nodal points of which thickenings are 

 found. Such an end-apparatus measures 60-1 10 /z in length and 

 40-50 ;f in breadth and is not only spread out over the surface 

 of the tendon, but extends to some depth embracing several 

 tendon fasciculi. Oval nuclei were now and then found on the 

 fibrils of the network, especially on the primary branches. 



The endings found in the tendons of the frog were essen- 

 tially as above described for the lizard, except that the end-ap- 



