Huber-DeWitt, Neuro-tendinous End-organs. 177 



end-organs under discussion, gives results which should be given 

 consideration whenever they are at variance with the results ob- 

 tained by the older methods. 



We shall discuss our own observations seriatim^ beginning 

 with the amphibia. 



Amphibia. 



Of the results obtained by numerous observers who have 

 studied the terminations of nerves in the tendons of amphibia, 

 those obtained by Ciaccio and Smirnow were such that we find 

 it unnecessary to add materially to the account given by them. 

 A corroborative statement may, however, not be wanting in 

 value. 



Rollet, who first described the termination of nerves in the 

 tendon of the frog, designates the endings in them as ' ' Nerven- 

 schollen'' and finds two parts, the one consisting of a short in- 

 ternodal segment, ending in a sharp point, the other of small 

 cellular plates with round nuclei or of grains arranged in undu- 

 lating lines and separated by spaces of the same form. Sachs 

 and Gemt described non-medullated fibers in the endings ; 

 Golgi described a network of small non-medullated fibers ; this 

 KoUiker corroborated, adding that the nerve branches of the 

 ending were invested with a nucleated sheath of Schwann. 

 Ciaccio, after describing the arrangement of the nerve in plexus, 

 says that it ends in a peculiar nerve plaque which he designates 

 as " touffe nerveuse finale. " These tufts, he says, are oblong 

 in shape, larger in the middle than at the extremities, and com- 

 posed of a bush-like mass of fine varicose fibers, which pene- 

 trate the primary tendon groups and end in free endings. He 

 thus disagrees with Gemt and Golgi, who affirm that the nerve 

 ending in the frog is the same as in reptilia. 



Smirnow also describes nerves ending in tufts of fine vari- 

 cose fibrillae, situated between the tendon fibers. The figures 

 given by Smirnow, who, it may be remembered, used the 

 methylen-blue method in his investigations, are very similar to 

 the ones we give for the nerve ending in the tendon of the frog, 

 although it would appear to us that our endings were more fully 

 stained or that we were dealing with much larger endings. 



