1910.] NATURAL SCIENCES OF PHILADELPHIA. 687 



crystalline rocks, old Paleozoic rocks and a trap dike near Lafayette, 

 Marble Hall and Spring Mill, Montgomery County; (2) The crystalline 

 rocks south of West Chester ; (3) The New Red and crystalline rocks near 

 Langhorne, Bucks County; (4) The crystalline rocks between Newtown 

 Square and Wallingford, Delaware County; (5) The minerals and 

 fossils near Mullica Hill, N. J. ; (6) The crystalline rocks near Paoli 

 and Castle Rock, Delaware County ; (7) The New Red rocks near the 

 Buckingham Mountain fault, in Bucks County. 



The membership of the Section has increased by one associate 

 member. 



The following officers of the Section have been elected for the year 

 1911: 



Director Benjamin Smith Lyman. 



Vice-Director Frank J. Keeley. 



Recorder and Secretary S. L. Schumo. 



Treasurer William B. Davis. 



Conservator George Vaux, Jr. 



Respectfully submitted by order of the Section. 



Benjamin Smith Lyman, 



Director. 



Ornithological Section. 



As was the case last year, work in the Ornithological department 

 has been seriously handicapped by the absence of Mr. Rehn in the 

 West during three months and the general curatorial work that has 

 devolved upon the Conservator. Nevertheless, much progress has 

 been made in the arrangement of the collection. All of the remaining 

 mounted birds, with the exception of the humming-birds, have been 

 identified and labelled, practically completing this important piece 

 of work. 



In the study collection all of the families of Passerine birds from the 

 thrushes to the crows, comprising some 450 drawers of skins, have 

 been reidentified and rearranged, while all the species represented 

 in the collection have been checked off in Sharpe's Hand List of Birds, 

 so that it will soon be possible to see at a glance exactly what species 

 the Academy possesses in each family. 



Labels have also been placed on all the drawers as far as the Turdidae. 



Twelve metal cases were procured during the year, part of which 

 were used in the rearrangment of the Passeres, while the others were 



