5S4 
PROCEEDINGS OF THE ACADEMY OF 
[Dec., 
to typical places of pre-Cambrian and early Paleozoic rocks, from 
Lafayette up the Schuylkill to Norristown, and thence to Henderson, 
Gulf Mills and Bryn Mawr. 
The membership of the Section has increased during the year by 
three associate members. The field excursions lead to joining it as 
associate members; and sometimes immediately, or later through 
interest in the meetings, to becoming members of the Academy. The 
full membership is now 25 members and 15 associate members, 40 in 
all. 
The following officers of the Section have been elected for the year 
1910: 
Director, . 
Vice-Divector , . 
Recorder and Secretary, 
Treasurer and Conservator, 
Respectfully submitted 
. Benjamin Smith Lyman. 
. Frank J. Keeley. 
. Silas L. Schumo. 
. George Vaux, Jr. 
r order of the Section. 
Benjamin Smith Lyman, 
Director. 
Ornithological Section. 
Work in the Ornithological department has been seriously hampered 
during the past year by the alterations to the top floor of the Museum, 
which necessitated the disarrangement of most of the cases for nearly 
six months, while the demands upon the Conservator’s time in looking- 
after other departments of the Museum and the absence of Mr. Rehn 
in the West also interfered with the work of the department. 
The cases have now, however, been permanently placed, all the 
drawers examined and the specimens arranged, while the rooms have 
been thoroughly cleaned. 
The remainder of the Tristram and Porter collections, comprising 
several thousand skins, have been systematically distributed, and the 
Van der Pol collection has been catalogued, while the Limnicolce or 
shore birds have been critically studied, reidentified and arranged 
in standard metal cases. 
It was found necessary to remove a large part of the exhibition 
series from the cases, so as to permit of the cleansing of both specimens 
and cases. A portion of this work has been accomplished, and one 
new exhibition case secured. For the study collection of skins ten 
additional metal and four large wooden cases were procured, which 
enables us for the first time to place the entire study series in 
