1910.] NATURAL SCIENCES OF PHILADELPHIA. 41 



February 1, 1910. 

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



Twelve persons present. 



The reception of a paper entitled "Mollusca of the Southwestern 

 States: IV. The Chiricahua Mountains, Arizona," by H. A. Pilsbry 

 and J. H. Ferriss (January 26, 1910), was announced by the Publica- 

 tion Committee. 



Henry A. Pilsbry, Sc.D., made a communication on parallel and 

 convergent evolution in snails. (No abstract.) 



Dr. Nolan exhibited and commented on specimens of Cingalese 

 script. (No abstract.) 



February 15. 

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



Twenty-eight persons present. 



The Publication Committee reported the reception of papers under 

 the following titles : 



"Crataegus in Pennsylvania, II," by C. S. Sargent (February 8, 1910). 



"A new Species of Marinula from near the head of the Gulf of 

 California," by Henry A. Pilsbry (February 12, 1910). 



John M. Macfarlane, Ph.D., made a communication on variation, 

 hybridization and heredity in native plants, illustrated by specimens. 

 (No abstract.) 



Merkel H. Jacobs, E. Waterman Dwight and Edward Anthony 

 Spitzka, M.D., were elected members. 



The following were ordered to be printed: 



