is:t ^VOBK ox MEDrS^ 59 



all at rest. It was just the one thing required to cap 

 the work on iasectivorous plants. What capital work 

 Frank is doing I 



I have nothing in the way of • boasting to set 

 off against it. The year has been a very bad one for 

 jelly-fish, so that sometimes I have not been able 

 to work at them for several days at a time. The most 

 important new observation is perhaps the following. 



IW^ 



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Fig. 3. 



Suppose a portion of Aurelia to be cut into the 

 form of a pair of trousers, in such a way that a 

 gangHon, a, occupies the bottom of one of the legs. 

 Usually, of course, contractile waves starting from 

 a course along to 6, and thence round to c and 

 backwards to d. But in one specimen I obsei-ved 

 that every now and then the exact converse took 

 place — viz. the contractile wave starting at d to 

 course to c, 6, and a. On now excising the 

 ganglion at a both sets of contractile waves ceased 

 — thus showing that even in the case where they 

 started from d it was the gangHon at a which 

 started them. This power on the part of Medusoid 

 ganglia to discharge their influence at a distance 

 from their own seat I have also observed in other 

 forms of section, and it afiords the best kind of 

 evidence in favour of nerves. 



