414 FOSSIL RADIATED ANIMALS. 
Chapter XYIT. 
Proofs of Design in the Structure of Fossil 
Radiated Animals, or Zoophytes. 
The same difficulties which we have felt in se- 
lecting from other grand Divisions of the animal 
kingdom, subjects of comparison between the ex- 
tinct and living forms of their respective Classes, 
Orders, and Families, embarrass our choice also 
from the last Division that remains for conside- 
ration. Volumes might be filled with descrip- 
tions of fossil species of those beautiful genera 
of Radiated Animals, whose living representa- 
tives crowd the waters of our present seas. 
The result of all comparisons between the liv- 
ing and fossil species of these families would be, 
that the latter differ almost always in species, 
and often in genus, from those which actually 
exist ; but that all are so similarly constructed on 
one and the same general Type, and show such 
perfect Unity of Design throughout the infinitely 
varied modifications, under which they now per- 
form, and ever have performed the functions 
allotted to them, that we can find no explanation 
of such otherwise mysterious Uniformity, than 
by referring it to the agency of one and the same 
Creative Intellis^ence. 
