258 



PROCEEDINGS OF THE ACADEMY OF 



[1888. 



common form of hypertrophy in the Anglo-American and one which 

 has a distinct clinical significance (see fig. 5). 



Figure 3. 



The palate is moderately high arched. The lateral elements are 

 elongated. The median elements are either two faint to be apparent 

 or are absent. 



The right lateral incisor is absent and the incisive pad shows an 

 inclination to the side of defect. The left sutural fold is directed 

 backM-ard at the raphe. 



The union of the right sutural and post-sutural rugse so as to 

 present a fork-like figure, the arms of the fork projecting outwards, 

 is frequently seen. 



The incisive pad, the raphe and the two sutural rugse in rare 

 instances may coalesce and give rise to a conspicuous cruciform 

 figure. 



The vertically placed lateral ends of the rugte are by far the 

 most constant of any parts of the series. They are especially well 

 developed in high narrow vaults.' 



The course of the posterior palatine vessels and nerves serve as a 

 guide to interesting conditions of the hard palate. 



The mucous membrane is pale where it overlies tissues which are 

 not in contact with the bone. The interval between the raphe and 



1 In the horse the roof of the mouth is very vascular. In Mephitis the pre- 

 sutural portion appears to be in a similar condition. The exact limitation of this 

 part of the roof is of interest and, so far as it goes, supports the position taken that 

 the rugLie are naturally divided into a pre-sutural and a post sutural set. 



