1909.] NATURAL SCIENCES OF PHILADELPHIA. 579 



more extended trips were made. Largely through the liberality of 

 Mr. Morgan Hebard, Mr. Rehn was enabled to accompany him on a 

 trip through the Western States, and a large collection of Orthoptera 

 and some other specimens were secured. 



Through the Esther Hermann Research Fund of the New York 

 Academy of Sciences, Mr. Stewardson Brown was enabled to make 

 another botanical exploration of Bermuda during May in the interests 

 of the New York Botanic Garden and this Academy. Dr. J. P. Moore 

 spent the summer collecting marine invertebrates at Martha's Vineyard 

 and Woods Hole. Mr. Clarence B. Moore has continued his explorations 

 of the Indian mounds of the Southern States, and has added many 

 valuable specimens to the collection made by him since 1893. The 

 Moore collection now contains over 5,000 specimens, all systematically 

 arranged and labelled by Mr. Moore. 



Among the more important accessions of the year may be men- 

 tioned the Clemens collection of Philippine birds, the Hinkley collec- 

 tion of Mexican mollusca, a collection of Brazilian insects made by 

 Miss H. B. Merrill — all secured [by purchase — and the Commons Her- 

 barium, an unusually complete collection of the flora of Delaware, 

 made by Mr. Albert Commons, and presented to the Academy by his 

 nephews, Messrs. Frank W. and Howard W. Commons. 



One mahogany and plate glass exhibition case has been added to 

 the bird hall, and forty-three storage cases and 15S Schmidt insect 

 boxes have been purchased. 



In addition Dr. J. P. Moore has cared for the collection of annelids 

 and Mr. H. W. Fowler the fishes, while Miss H. N. Wardle has 

 arranged portions of the archaeological specimens. 



To Mr. Sam'l S. Van Pelt in the Herbarium and to Mr. E. T. Cresson , Jr. , 

 in the Entomological department the Curators are indebted for valuable 

 assistance. 



Specimens have been loaned during the year to A. S. Hitchcock, 

 C. J. Pennock, Dr. Ludwig Neumayer, J. H. Fleming, F. C. Baker, 

 Mary J. Rathbun, Robert Ridgway, Dr. Paul Bartsch, H. C. Oberholser, 

 Merritt Cary and W. W. Eggleston. 



Samuel G. Dixon, 



Curator. 



Report of the Department of Mollusca. 



Work during the past year has been chiefly directed to the prepa- 

 ration, determination and labelling of new material added to the col- 

 lections, and to the preparation of an illustrated monograph on the 



