OF THE ITBRVE-TUFTS, NERVE-EMINENCES, ETC. 261 



in p. 182 concerning the hrancliing of nerve-fibres, 

 are observed in the nerves of this animal; and I 

 have been able to obtain many specimens of nerves 

 which could hardly be distinguished from some of 

 the finest dark-bordered fibres of the higher animals. 

 Some of the muscular fibres of this animal are very 

 thin, and are separated from one another by con- 

 siderable intervals, in which the ramification of ex- 

 ceedingly delicate nerve-fibres can be readily detected, 

 and the nerve-fibres can be followed to their con- 

 nection with ganglion- cells. I have prepared many 

 specimens of the muscles of the leech, and have made 

 several drawings to illustrate these points. 



285. Of the nerve-tufts, nerve-eminences, and 

 :n erven liiigel, seen in conneetion with certain muscular 

 nerves. — To Kilhne is undoubtedly due the merit of 

 having observed the so-called end iilates or end organs 

 in voluntary muscle, and it is not surprising that he 

 should have been led to regard them as the special 

 nerve organs of this tissue, and inferred that they 

 were present in all muscles. He has studied princi- 

 pally large muscular fibres, and considers these most 

 favourable for observation, but it seems not to have 

 occurred to him that in consequence of the refractive 

 power of the contractile tissue, the very fine nerve 

 fibres, if present, would be completely obscured. I 

 do not think he has yet formed the slightest idea of 

 the general arrangement and great number of the fine 

 nerve fibres in voluntary muscle as may be demon- 

 strated, for example, in the delicate mylohyoid muscle 

 of the hyla. At least, in the chameleon, several fibres 

 are to be seen passing to and from each nerve tuft, 

 but Kiihne has only figured a single dark-bordered 

 fibre entering each tuft. I propose now to consider 

 the structure of these peculiar so-called end- bodies 

 in connection with the nerves distributed to the 

 muscles of certain animals, and described by Kiihne, 

 Rouget, Krause, and others. These difier from the 



