1888.] 



NATURAL SCIENCES OF PHILADELPHIA. 



269 



manner in which the rugse are aborted by protusion of the premax- 

 illary elements, and of the hyperostosis of the structures at the 

 raphe. When the vault is flat — the rugse tending to be symmeLrical 

 though feebly developed, — a condition is present which is often 

 found associated with chronic nasal catarrh of the atrophic type. 

 If the arch is wide the sides of the palate and the alveolar processes 



Figure g. 

 The hard palate is without neck-fol<is, is of low arch and is wide. 

 The raphe is nearly obliterated, The rugte are broken. The lat- 

 eral half of the third post-sutural fold extends obliquely forward and 

 is in line with one of the median elements (probably of the second). 

 No similar disposition is seen on the left. Lateral concresence is 

 seen on the left side. 

 are not well developed, the rugse are gathered in a clump upon an 

 anterior declivity of low inclination, the turbinal scrolls are .small, 

 and the membranes nonerectile. The teeth in such individuals are 

 large especially the incisors, the patient is predisposed to premature 

 recession of the gums from about the necks of the teeth and to 

 suppurative affections of their roots.^ 



The Incisive Pad. The pad is often of a bluish red color when 

 the palate elsewhere is of a pale hue. At other times the pad is of 

 pink color and the base surrounded by a deep blue line. Thus the 

 pad may be congested either in whole or in part while the rest of 



1 For the connection between atrophic catarrh and premature recession of the 

 gum see a paper by the author in Dental Cosmos, 1885, xxvii, 329. 



