224 MODE OF TERMINATION OF MOTOR NERVES, BY W. KUHNE. 



According to Doyere, the pale, transparent, and non-granular 

 nerve of Milnesium tardigradum becomes converted at the peri- 

 phery into a finely granular eminence, which partly surrounds 

 the equally pale, untroubled, and non-striated muscular fibre, 

 and may extend a little distance along its border. These state- 

 ments have been completely corroborated by renewed and very 

 careful investigation of the Tardigrada (bear animalcules) by 

 V. Greeff. This observer readily found the appearances so long 

 known from Doyere's drawings, but also observed a small 

 spherical nucleus to be constantly present in the little nerve 

 eminence, with a few sparsely scattered somewhat larger nuclei, 

 very sparingly surrounded by punctated protoplasm, adherent 

 to the muscle, and which for the most part lie at a consider- 



Fig. 37. 



Fig. 37. Termination of a nerve in Milnesium tardigradum (one of 

 the sloth or bear animalcules), according to Greeff. M, muscular fibre ; 

 K, nucleus of muscle ; D, eminence of Doyere ; N, nerve. 



able distance from the termination of the nerve. V. Greeif 

 was unable to find, either on the nerve or on the muscle, anything 

 corresponding to the sheath of Schwann or to the sarcolemma. 



Of those points which have been described by a few observers 

 in respect to the termination of the nerves in the non-striated 

 muscles of the lower animals, and in the smooth muscular tis- 

 sue of the Vertebrata, mention has already been made under 

 their appropriate heading. Trinchese has given some details 

 respecting the termination of the nerves in the muscles, that 



