370 Darwin, and after Darwin. 



latest products of the animal's phylogeny ; and, (2) 

 that as yet, at all events, it has not begun to degenerate. 

 But, if not, it must either be at a stand-still, or it must 

 be in course of further evolution ; and, whichever of 



FIG. 1 20. Electric cells of Aata radiata. The drawing on the left, 

 represents one of the clubs magnified, as in the preceding wood-cut. 

 The drawing on the right represents a number of these clubs, less highly 

 magnified, in situ. 



these alternatives we adopt, the difficulty of account- 

 ing for its present condition remains. In this con- 

 nexion also it is worth while to remark that the electric 



