NOTES AND EXHIBITS. 45 



by the maxillse, and it extends backwards to a plane from 2-3 mm. 

 behind the tip of the anterior median process of the latter, from 

 which it is separated by an interval. This interval forms a wide 

 passage of communication (1 mm. vertically), below the nasal 

 septum, between the nasal cavities of opposite sides, and it is 

 lined by columnar epithelium like the neighbouring parts of these 

 cavities. The 'dumb-bell-shaped bone' is a true ' anterior vomer ' 

 formed by the fusion of bilaterally symmetrical halves ; and both 

 in its nasal and in its palatine relations it resembles the palatine 

 lobe of the vomer in Caiman niger." 



