192 EXPLANATION OF THE PLATES. 



striation in the direction of their length ; 6, another fibre, in 

 which this appearance is more strongly marked. 



FIG. V. G-emellus muscle hardened by cooking (from a 

 newly born infant). 1, Myolemma ; 2, its contents, showing 

 transverse striae ; 3, nucleus ; 4, a broken fibre, with its con- 

 tents divided into discs ; 5, a fibre in which the division of its 

 contents into discs is very well marked. 



PLATE X. 



MUSCLE, continued. 



FIG. I. Antero-posterior section of the tongue (in a 



newly-born infant). 1, Muscular fasciculi seen in the direction 

 of their length; 2, same, in transverse section. 



FIG. II. Different views of striped muscular fibre. 

 1, A fibre, the contents of which are crushed in two places ; at 

 its left extremity its myolemma is very well seen, corrugated 

 and contracted upon itself; 2, a fibre with transverse striae, 

 showing a nucleus (3) ; 4, a fibre in which both longitudinal 

 and transverse stripes are visible ; 5, another fibre broken off at 

 its upper -extremity ; each fib rill a is seen to be composed of a 

 series of slightly flattened granules superimposed upon each 

 other. All of these muscular fibres were procured from the 

 perfectly fresh biceps muscle of a suicide. 



FIG. III. Fibres of the heart. 1, A common trunk giving 

 off several brandies ; 2, divisions of the trunk. 



PLATE XI. 



Distribution of the nerves as seen in the subcutaneous pec- 

 toral muscle of a frog. The parallel lines indicate the outlines 

 of the muscular fibres. 



