584 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, ..... Benjamin Smith Lyman. 



Vice-Director, ..... Frank J. Keeley. 



Recorder and Secretary, . . . Silas L. Schumo. 



Treasurer and Conservator, . . George Vaux, Jr. 



Respectfully submitted by 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 



