39] THE NASAL ORGAN IN AMPHIBIA—HIGGINS 39 
from the medial margin of the lamina externa is a remnant of an ancestral 
ethmoidal column, which originally was united to the more medial parts 
of the capsule. 
Although some homologies may be drawn between the capsules of 
Epicrium and the Urodeles, the divergence between the two is sufficient 
to warrant the separation of the Caecilians and the maintenance of the 
Gymnophiona, distinct from all other Amphibia. Although the greater 
resemblance among the Urodeles is to Amphiuma, yet it is not sufficient to 
warrant the position of either Cope or Sarasin in the relationship of these 
groups. 
