924 PROCEEDINGS OF THE ACADEMY OF [DeC, 



We have also been favored with a set of duplicates of Japanese fresh- 

 water bivalves from the Imperial Museum at Tokyo, 



The study of the mollusca collected by Mr. J. H. Ferriss and the 

 Curator in the Southwestern expedition of 1903 has now been com- 

 pleted and a full report thereon prepared. The collections made in 

 the Southwest by Dr. H. Skinner, T. D. A. Cockerell, Joshua and Albert 

 Baily and others have been included in this report. 



A series of Alabama mollusks, supplementing that obtained last year, 

 has been purchased from the veteran collector, H. H. Smith. 



Numerous members of the Academy and correspondents of the 

 Curator have also contributed largely to the collection. A list of these 

 gifts is given in the Accessions to the Museum. 



Seventeen papers, based chiefly upon new material, have been pub- 

 lished during the year by the Special and Assistant Curators of the 

 department. • 



All of the Pliocene invertebrate fossils in our possession have been 

 gathered together and installed in two large cases in the gallery for- 

 merly occupied by birds. 



A large part of the Special Curator's time has been occupied with the 

 preparation and publication of the Manual of Concfiology, in which 

 the family Achatinidoe is dealt with. 



Mr. E. G. Vanatta has continued his efficient work as assistant in 

 the department throughout the year. 



H. A. PiLSBRY, 



Special Curator. 



REPORTS OF THE SECTIONS. 



The Mineralogical and Geological Section. 



t 



The Section has this year with increased zeal and yet better results 

 continued its meetings and field excursions. 



There have been nine meetings, with an average attendance of over 

 14. Communications were made by Dr. Florence Bascom, on the 

 Piedmont belt of Pennsylvania, and on the crystalline rocks of the 

 Coatesville and Phoenixville Quadrangle; by Mr. Gilbert Van Ingen, on 

 fossils of southwestern Arkansas (illustrated by lantern slides) ; by Mr. 

 S. H. Hamilton, on moulders' sands; by Mr. F. Lynwood Garrison, on 

 Santo Domingo (illustrated by lantern slides) ; by Miss Mary S. Holmes, 

 on asphaltum in California; by Dr. Benjamin L. Miller, on the geology 



