354 THE STERNAL GLAND OF DIDELPHYS DIMIDIATA. [JuDC 5, 



smooth appearance and the mouths of the glands were widely 

 dilated. 



In DideljjJiys the skin in this region of the body was much 



Fig. 1. 



Didelphys dimidiata. 

 Ventral view of head aud neck, to show tlio sternal gland. 



Fig. 2. 



Didelphys dhnldiafa. 

 Sternal gland, more highly magnified. 



wrinkled, and the mouths of the glands were not apparent. This looks 

 very nuich as if the difference were merely due totlie more contracted 



