1885. Recent Literature. IIQI 
tissue (yz) became totally paralyzed, while the outer circle, of 
course, continued its contractions as before. 
Lastly a third mode of section was made (Fig. 4); a long strip 
removed, with the eye and its ganglion at one end and the rest of 
the swimming-bell at the other, the latter contracting, and such a 
strip may be made a yard long, but still the portion of the swim- 
ming-bell continues to contract. From these experiments and 
the histological studies of Professor Shafer, it is seen that the 
“ nerve fibers which so thickly overspread the muscular sheet of 
Aurelia do not constitute a true’ plexus, but that each fiber is 
Ww \ 
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FIG. 3.—Aurelia with a circular cut z. 
comparatively short and nowhere joins with any of the other 
fibers ; that is to say, although the constituent fibers of the net- 
work cross and recross one another in all directions—sometimes, 
indeed, twisting round one another like the strands of a rope— 
they can never be actually seen to join, but remain anatomically 
insulated throughout their length. So that the simile by which 
I have represented this nervous network—the simile, namely, of 
a sheet of muslin overspreading the whole of the muscular sheet 
—is, as a simile, even more accurate than has hitherto appeared ; 
for just as in a piece of muslin the constituent threads, although 
frequently meeting one another, never actually coalesce, so. in the 
VOL, XIX.—NO. XII. 
