aici 
102 JELLY-FISH, STAR-FISH, AND SEA-URCHINS. 
nil te EY 
ing paralyzed. Hence, befure the removal of the 
lithocyst, the contraction-waves which originated 
at the point 0, no less than those which originated 
at the lithocyst itself, must in some way or other 
have been due to the ganglionic influence emanat- 
ing from the lithocyst and asserting itself at the 
distant point o. 
vi oye 
a 
AU 1 
“A Tae AN 
ida 
M Ky 
Fig. 21. 
This property, which lithocysts sometimes present, 
of asserting their ganglionic influence at a distance 
from their own locality, can only, I think, be ex- 
plained by supposing that at the point where under 
these cireumstances the contractions originate, 
there are situated some scattered ganglionic cells of 
