180 Dana on the Classification of Animals 
the forces and material of the being can develop at one time but 
one or a few ova; in others inferior, the amount required for each 
is so small, or, is so small a part of the whole energies of the indi- 
vidual, that the number produced is almost indefinitely large. 
4. Relation of the law of amplification to the law of axial distribu: 
tion of force—The condition as to the distribution of force along 
the body-axis under a type, determines, as has been shown, the 
form or general nature of the structure, in any case, an the 
structure thus established is that which undergoes amplification. 
Thus the law of amplification is secondary to the law of axial 
distribution. Gross-amplification in a Whale is amplification of 
a urosthenie structure, or one in which the forces are so distribu: 
ted along the axis that the anterior pole is not very highly supe 
Mammals, that sensorial and other higher cephalic force becomes 
converted, in the transfer posteriorly, into muscular force; 8° 
that a Whale is a representative of the force of a typical megas 
thene,—a Lion, for example—in the condition almost exclusively 
of muscular force. The last part of this statement may be quite 
true; for the Whale may not differ from a Lion so much in 
by the cephalic polarity of the life-energy characterizing the 
organism under development. The brain is the last part of a0 
animal that is perfected. It becomes complete in its poweTS, a 
after the rest of the structure has so far reached its limits 
material on the one great feature of the being. In th 
way the cephalized structure attains its most highly eephalized 
condition. at 
The views here set forth rest on the ground that in a living 
organism there are not only molecular forces every where ind 
vidually at work, carrying on all changes and growth, but es 
