230 Journal of Comparative Neurology. 



Figs, ji, J2. Muscle-spindle of a bird. 



Fig.ji. Longitudinal section of muscle-spindle of a dove, showing the 

 ending of one of non-medullated terminal branches (a) of a spindle-nerve. 

 Fig. ^2. Cross section of muscle-spindle of a dove. 



PLATE XVL Muscle-spindle of Mammalia. 



Lettering the same as on plate XV. 



Fig. jj. Longitudinal section of compound muscle-spindle from the in- 

 trinsic plantar muscle of the rabbit. 



Fig, J4. Cross section of muscle from the intrinsic plantar muscle of a cat. 

 Fig. jj. The same. 



PLATE XVIL 



Fig. j6. Muscle-spindles from cutaneous pectoris muscle of frog. Re- 

 duced to one half. 



Fig. J/. Muscle-spindle from back muscles of the snake. Reduced to 

 one half. 



m. e. — motorial ending; m. f. [a] is under the fiber and probably the end- 

 ing is on another fiber. 



Fig. jS. Muscle-spindle from intrinsic plantar muscles of a dog. Reduced 

 to one half. 



PLATE XVIIL 



Fig. jg. Compound muscle-spindle fram the intrinsic plantar muscles of a 

 dog, showing three areas of nerve distribution. 



Sy. n. — Sympathetic nerve fibers — vaso-motor fibers. 

 m. e. — motorial endings. 

 Reduced three times. 



