452 F. B. HUTT 



less such differences are recognized. It is suggested that a more widespread 

 recognition of the fact that such differences exist may help to account for 

 some of the frequent cases of apparently irregular genetic behaviour of in- 

 herited characters in man. 



LITERATURE CITED 



Baur, E., Fischer, E., and Lenz, F. 1931. Human Heredity, translated by E. and 



C. Paul. New York, The Macmillan Company. 

 Downs, W. G., Jr. 1927 Studies in the causes of dental anomalies. Genetics, 12: 



570-580. 

 Gates, R. Ruggles 1929 Heredity in Man. New York, The Macmillan Company. 

 Osborn, D. 1916 Inheritance of baldness. Journ. Hered., 7: 347-355. 

 Schofield, R. 1921. Inheritance of webbed toes. Journ. Hered., 12: 400-401. 

 Schultz, A. H. 1932. The hereditary tendency to eliminate the upper lateral incisors. 



Human Biol., 4: 34-40. 



