39] THE NA SA L ORG A N IN A MPHIBIA —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. 



