1910.] 
NATURAL SCIENCES OF PHILADELPHIA 
6S7 
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 Turdidse. 
Twelve metal cases were procured during the year, part of which 
were used in the rearrangment of the Passeres, while the others were 
