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CERTAIN TERMINAL ORGANS OF THE SKATE. 517 
EXcEPTIONAL APPEARANCES. 
(i) The presence of a spiral thread coiled on the outside of 
or immediately within the terminal dilatation. I was fortunate 
enough in one of my preparations (fig. 4) to see this very dis- 
‘tinctly, the capsule surrounding the axis-cylinder having burst, 
rendering the examination of the terminal portion extremely 
easy. The spiral thread can be seen with a magnification of 
about 700 diameters, though, of course, higher powers render 
it more distinct. 
(ii) The only other appearance worthy of remark is the 
meeting and apparent blending of three or four nerves within 
a common capsule (fig. 3); such terminations of nerves inside 
a common capsule have been described by various observers 
(vide Quain’s Anat. ‘‘ Terminal Organs’’). 
Note.—To prevent any misunderstanding, it ought to be 
stated that by ‘‘intra-muscular connective tissue” in the fore- 
going account is meant the connective-tissue septa surrounding 
the muscular cones which collectively constitute the musculus 
sacro-lumbalis of the Skate. 
VOL, XXX, PART 4,—NEW SER. Eek 
