1911.} 
NATURAL SCIENCES OF PHILADELPHIA. 
599 
The assistance rendered by Dr. Amos P. Brown, who has co¬ 
operated with the Curator in working up collections made by him 
in Jamaica, is gratefully acknowledged. 
In the' absence of a palaeontologist, the Curator has, with the 
volunteer assistance of Dr. A. P. Brown, taken up much-needed 
work on the palaeontological collection, which, on account of the 
large number of type specimens, is one of the most important in 
America. Various brief publications on Miocene and Cretaceous 
Mollusca have grown out of the work done on the collections. Dr. 
Brown has collaborated in studies on the Oligocene fauna of the 
Isthmus of Panama. The results have been published in the Pro¬ 
ceedings, and the material, comprising numerous types, placed in 
the Museum. 
H. A. PlLSBRY, 
Special Curator Department of Mollusca. 
Report of Curator of William S. Vaux Collection. 
During the past year there has been added to the William S. Vaux 
Collections eleven specimens of minerals, which, while few in number, 
are of exceptional value and interest. Among those deserving- 
special mention are meteorites from York County, Pa., a large twin 
titanite from Canada, and two native silvers from Lake Superior. 
Respectfully submitted, 
F. J. Keeley, 
Curator Wm. S. Vaux Collection. 
REPORTS OF THE SECTIONS. 
Biological and Microscopical Section. 
Nine stated and several informal meetings of the Section have 
been held during the year, with the usual attendance. Two new 
members have been added and one resignation has occurred. 
The work of the year lias consisted of miscellaneous communica¬ 
tions, the most important of which, Micro-Spectroscopic Observations, 
by Mr. F. J. Keeley, was presented at the meeting with the Academy 
and is published in the Proceedings. 
The Conservator reports an addition to the Museum of three 
hundred and ten slides of microscopic objects, the gift of Dr. J. 
Cheston Morris. 
