36 Mr. E. R. Lankester on the use of © 
and B from x. Though this is the definition of homology 
which we should expect from an evolutionist, it is yet not that 
who, there is e reason to believe, accept the doctrine of 
evolution, we sl L 
Arthropoda at a point in the series where the nervous syste mis 
of the simplest and most rudimentary kind, it is only to a small 
