VOL. III.] Proceedings, of Societies. 273 



A paper by Dr. J. G. Cooper on Land and Fresh-water Shells 

 cf Lower California was read by title. 



The Secretary read a paper prepared by Melville Attwood on 

 the advisibility of making- an exhibition of Californian iron ores at 

 the World's Columbian Exposition. 



Dr. Harkness exhibited a living specimen of Amblystoma and 

 made a few remarks concerning its metamorphosis. 



Charles A. Keeler and Prof. W. E. Ritter discussed certain points 

 in Romanes' theory of natural selection. 



September § , i8g2. President Harkness in the chair. 



Donations to the museum were reported from W. G. Blunt, Carlos 

 Troyer, R. G. Stitt, Lieutenant Holcomb, E. W. Jones, Melville 

 Attwood, R. C. McGregor, Miss Effie A. Mclllriach, George B. 

 Badger, Sidney M. Smith, Mrs. Nuttall, Mrs. Bush, A. W. Craw- 

 ford, T. H. Hittell. 



Twelve hundred and twenty-six additions to the library were re- 

 ported. 



E. W. [ones, by invitation, addressed the Academy on the sub- 

 ject of tin mining, explaining the methods used at the Temescal 

 mine in working the ore. 



Charles Fuchs made some remarks on PJiloeosimis deiitatiis Say, 

 which is ravaging the cypress trees. 



September ig, i8g2. President Harkness in the chair. 



Donations to the museum were reported from C. H. and Dr. E. S. 

 Clark, Henry Lorenzen, J. B. Haggin, James E. Requa, Carlos 

 Troyer, G. P. Rixford, Mrs. A. E. Bush. 



The Librarian reported 207 additions to the library. 



Charles A. Keeler read a paper entitled Sexual Selection as a 

 factor in the Beautiful in Nature. 



October j, i8g2. President Harkness in the chair. 



Anthony W. Vogdes and Oscar T. Baron were elected resident 

 members. 



Donations to the museum were reported from H. S. Nichols, Miss 

 Effie A. Mclllriach, Olaf Olsen, Dr. J. G. Cooper, Dr. L. D.Morse, 

 M. Braverman. 



Seventy- six additions to the library were reported. 



Major J. W. Powell, Director of the United States Geological 

 Survey, delivered a lecture on the Aboriginal Tribes of North 

 America. 



A vote of thanks was tendered to Major Powell. 



