1906.] 
NATURAL SCIENCES OF PHILADELPHIA. 
587 
the purpose of making entomological collections, but a serious attack 
of illness materially interfered with his work. 
Dr. H. A. Pilsbrv spent October and November in the prosecution 
of his studies on the molluscan fauna of Arizona. 
In addition to these extended expeditions many local collecting 
trips have been undertaken by the members of the Museum staff and 
much valuable material secured. 
Among the more notable accessions to the Museum during the year 
may be mentioned the Gulick collection of Hawaiian mollusks, which 
formed the basis of Mr. Gulick’s well-known paper on “Evolution, 
Racial and Habitudinal”; the collection of bird skins formed by the 
late Canon Tristram, of Durham, England, representing over 3,000 
species from all parts of the world, a large proportion of them new to 
the Academy’s collection; and another valuable collection of marine 
invertebrates from Naples, presented by Dr. Henry C. Chapman. 
A number of valuable mammals received from the Zoological Society 
of Philadelphia or by purchase have been mounted by the taxidermist 
and many others prepared as skins or skeletons. Considerable addi- 
tions have been made to the alcoholic series in Herpetology. 
In addition to the services rendered by the Museum staff the Curators 
are indebted to Dr. P. P. Calvert, Messrs. E. T. Cresson, Jr., and H. W. 
Wenzel for aid in the Entomological department, and to Mr. S. S. 
Van Pelt in the Herbarium. 
Details of the year’s work in several departments are appended. In 
addition Dr. J. P. Moore has continued the care and study of the 
Helminthological collections, and Mr. H. W. Fowler of the Fishes, 
while Miss H. N. Wardle has made progress in cataloguing and arrang- 
ing the Archaeological collections. 
The Anti-Tuberculosis Society, Philadelphia Botanical Club, and 
Delaware Valley Ornithological Club have held their meetings in the 
Academy during the year. The collections have been consulted by 
many visiting scientists and specimens have been loaned to Robert 
Ridgway, H. W. Henshaw, PI. I. Smith, C. Hart Merriam, D. G. Elliot, 
M. W. Lyon, H. F. Osborn, E. B. Williamson, Frank Stephens, G. W. 
Clapp, A. N. Caudell, 0. P. Hay, O. A. Peterson, G. S. Miller, Jr., F. 
C. Baker, Lawrence Bruner, Earl Douglass, and E. W. Nelson. 
Samuel G. Dixon, 
Curator. 
Report of the Special Curator of the Department of Mollusca. 
Early in the year the entire collection of mollusks was removed from 
the upper gallery, and has remained packed up during the construction 
