250 J. D, Dana—Cephalization. 
dition once established, the progress afterward, connected with 
brain growth or change, might well be a Gevelopment 10 that 
line of type structure, displaying the type under new forms. 
I do not mean to imply, in the above, that the method of 
progress pointed out accounts for the existence of the various 
types of structure in the animal kingdom, or for all the devel 
opments under them; but only that, whatever the sa 
ular laws; and how connected, man may never know. 
: 4 hod of evolu: 
ook ‘ é t 
is without its poten law of development. But the Lace 
i avors the view of “ progress through t Divine 
vation of species from species, with few occasions for 
ie at Se ate Mi tea ae ek WAS arama ee eats ae aaah se fa SRE i 
