1913.] NATURAL SCIENCES OF PHILADELPHIA. 701 



number of valuable specimens to his collection. The general archaeo- 

 logical collection has benefited as heretofore from the attention of 

 Miss H. N. Warden. 



Mr. Henry W. Fowler has, as usual, cared for the ichthj^ological 

 collection and has also incorporated all of the additions to the col- 

 lection of reptiles and amphibians and examined and rearranged 

 the entire series of alcoholic crustaceans. 



Dr. J. P. Moore has cared for the collections of worms as in previous 

 years. 



Work in other departments is described in the appended special 

 reports. 



In addition to the work of the museum staff, the Curators are 

 indebted to Mr, F. J. Keeley for the care of the Wm. S. Vaux col- 

 lection of minerals ; to Mr. Morgan Hebard for furnishing an assistant 

 in the entomological department to mount specimens of Orthoptera ; 

 to Dr. Amos P. Brown for the identification of many specimens of 

 invertebrate fossils, and to ]Messrs. S. S. VanPelt and Bayard Long 

 for the care of the local herbarium. 



Several notable expeditions have been undertaken liy members 

 of the museum staff. 



Dr. H. A. Pilsbry spent the first three months of the year in the 

 Hawaiian Islands making studies and collections for a monograph 

 of Hawaiian tree snails. Details of his work will be found in the 

 special report appended hereto. 



Mr. J. A. G. Rehn spent the month of July with Mr. Morgan 

 Hebard investigating the Orthoptera of the Southern States from 

 Virginia to Georgia. They made a valuable joint collection. 



Mr. Stewardson Brown again visited Bermuda in company with 

 Dr. N. L. Britton, in September, and continued the investigation of 

 the flora of the island. 



Many short trips were also undertaken which have added largely 

 to the local collections of fishes, reptiles, insects, moUusks, plants, etc. 



Fifty-two storage cases and two-hundred and two insect boxes 

 have been purchased during the year. 



Many valuable additions have been received bj' gift, purchase, and 

 exchange, as set forth in the accompanying list of accessions. 



The Delaware Valley Ornithological Club, Philadelphia Botanical 

 Club, and Pennsylvania Audubon Society have held their meetings 

 regularly at the Academy during the year and the American Asso- 

 ciation of Museums convened here for their annual meeting in April. 



The attendance in the museum is constantly increasing, especially 



