272 PROCEEDINGS OF THE ACADEMY OF [1888. 



Respecting the presence of catarrhal affections in the cases it is 

 necessary to say that not a single man among the entiTe number ex- 

 amined had complained to Dr. Robinson of any of the symptoms of 

 these diseases. I detected small quantities of secretion in the nasal 

 pharynx in fifteen instances. I cannot admit that this circumstance 

 had any significance in the absence of any of the usual appearances 

 of the membranes. 



The teeth and nasal chambers were also examined but nothing- 

 found which is of special mention. 



Cohcliisions. The following conclusions may be drawn from the 

 statements made in tlie paper. 



(1) That the range of variation in the roof of the mouth and its 

 folds is greater in subjects of nasal catarrh than in those who are 

 free from this disease. 



(2) That the variations of the rugae are different on the two 

 sides of the roof. 



(3) That excess of development of the pre-maxilla and the hori- 

 zontal plate of the maxilla, especially at the anterior portion, con- 

 stitutes a condition which is found in about fifty per cent, of cases of 

 chronic nasal catarrh. 



(4) That chronic nasal catarrh is found associated with so many 

 phases of asymmetry of the rugae of the hard palate and the dental 

 arches that the disease should be studied as a morbid action which 

 is based upon morphological elements and not alone upon climatic 

 conditions. 



