1897.] natural sciences of philadelphia. 145 



March 2. 



Mr. Charles Morris, in the Chair. 



Thirty-five persons present. 



Papers under the following titles were presented for publication : — 

 " The Genus Sturnella," by Witmer Stone. 



" Diptera Collected by Dr. A. Donaldson Smith in Somaliland, 

 Eastern Africa," by Chas. W. Johnson. 



March' 9. 



Charles Schaeffer, M. D., in the Chair. 



Twenty-eight persons present. 



A paper entitled "Underground Runners," by Ida A. Keller, 

 was presented for publication. 



March 16. 

 The President, Samuel G. Dixon, M. D., in the Chair. 

 Sixty-one persons present. 



March 23. 

 Mr. Charles Morris, in the Chair. 

 Twenty-four persons present. 



March 30. 

 The President, Samuel G. Dixon, M. D., in the Chair. 



Thirty-five persons present. 



Premolars and Form of the Skull. — Dr. Harrison Allen pro- 

 posed to call the teeth back of the canines in Man the premolars, 

 since they are followed in direct infra-position by the teeth of the 

 same name in the permanent set : thus the deciduous series do not 

 possess molars. 



He also spoke of the effects of diseased action on the form of the 

 skull. Many of the so-called types were of late origin, due to 

 various phases of malnutrition and were not of much systemic 

 significance. 



The following were ordered to be printed : — 



