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 
Fic. 120.—Electrie cells of A'aza radiata. The diawing 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, 27 sz¢ze. 
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 
