VOb. 1.4 Proceedings of Soctettes. 273 
A paper by Dr. J. G. Cooper on Land and Fresh-water Shells 
of 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 5, 1892. 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. Jones, 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 Phiwosinus dentatus Say, 
which is ravaging the cypress trees. 
September 19, 1892. President Harkness in the chair. 
Donations to the museum were reported from C. H. and Dra 
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 3, 1892. President Harkness in the chair. 
Anthony W. Vogdes and Oscar T. Baron were elected resident 
meinbers. 
Donations to the museum were reporte 
Effie A. Mclllriach, Olaf Olsen, Dr. J. G. Cooper, 
-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. 
d from H. S. Nichols, Miss 
Dr. L. D. Morse, 
