1915.] 
NATURAL SCIENCES OF PHILADELPHIA. 
585 
tions, including Messrs. A. F. Satterthwait, A. P. Morse, E. Daecke, 
C. W. Long, W. T. Davis, J. C. Bradley, Charles Schaeffer, J. C. 
Crawford, Si A. Rohwer, A. B. Gahen, R. A. Cushman, A. N. Caudell, 
and A. Avinoff. 
Material has been loaned to Dr. E. M. Walker. 
Other Invertebrates. 
Mr. H. W. Fowler has looked after the alcoholic material and 
arranged numerous small local collections of spiders, Crustacea, etc. 
Mr. J. Id. Emerton has studied the series of spiders during the year. 
Specimens of annelids have been loaned to Dr. C. A. Kofoid, and 
J. F. Daniel. 
Invertebrate Fossils. 
Dr. A. P. Brown has spent considerable time at the Academy 
during the summer months studying the collections in this depart¬ 
ment and in conjunction with Dr. Pilsbry has prepared a report on 
the Oligocene fossils obtained by Mr. Lloyd B. Smith in Colombia. 
Drs. A. Olsen and L. W. Stephenson have spent some time studying 
the collections, and material has been loaned to F. W. Stanton and 
T. Wayland Vaughan. 
Vertebrate Fossils. 
The large slabs of fossil footprints together with certain geological 
specimens have been arranged on the wall spaces between the windows 
in the mineralogica! hall. 
Material was loaned during the year to Drs. 0. P. Hay and J. C. 
Merriam, and in return for the courtesy Dr. Merriam presented the 
Academy with a specimen of Smilodon from the asphalt deposits 
of the Rancho La Brea, California. 
Herbarium. 
Mr. Stewardson Brown’s continued illness has again kept him from 
his duties in charge of the Herbarium for about half of the past year, 
while for several months he was absent with Dr. N. L. Britton on a 
collecting trip to Porto Rico. 
During his absence the Academy has again been dependent upon 
the voluntary services of Messrs. Bayard Long and S. S. Van Pelt, 
who have generously looked after the general herbarium in addition 
to their continued care and development of the local herbarium 
in which they have interested themselves for a number of years. 
