1918.] 
NATURAL SCIENCES OF PHILADELPHIA. 
353 
made on the critical study of the series of flying fishes, half-beaks 
and green gars. 
General care of the collections (both of fishes and reptiles) has oc¬ 
cupied considerable time, necessitating the rebottling and cleansing 
of many specimens. 
Mr. Fowler did some field work in Perry County, Pa., and Cape 
May Co., N. J. Specimens of reptiles were loaned during the year 
to the American Museum of Natural History. Mr. Alex. Ruthven, 
Dr. Thomas Barbour, Mr. F. N. Blanchard and Mr. Alvin Seal 
spent some days in studying material at the Academy. 
Mollusks. 
Dr. Henry A. Pilsbry, curator of Mollusca, reports that acces¬ 
sions to the conchological department have been received from sixtv- 
seven persons and institutions. Among them may be mentioned a 
series of Congo mollusks from the American Museum of Natural 
History, including paratypes of many new species, and a consider¬ 
able number of Hawaiian mollusks received from the Bishop Museum 
and from Prof. W. A. Bryan. Mr. J. H. Ferriss shared his Arizona 
collections of 1917 and 1918 with the Academy and Prof. Junius 
Henderson has presented series of his Idaho and Colorado collec¬ 
tions. 
The revision of the Academy collection of Pupillidae has been con¬ 
tinued in connection with the publication of a second volume on this 
group in the Manual of Conchology. In collaboration with Mr. 
Ferriss a report on the mollusks of the Santa Catalina mountains 
and the Mogollon mountains, Arizona, has been prepared for pub¬ 
lication. Mr. E. G. Vanatta has continued the arrangement of the 
exhibition series of shells and Miss Caroline Ziegler has made good 
progress in cataloguing the specimens. Considerable time has been 
given to the determination of material for correspondents. 
Mr. J. A. Ferriss, W. H. Clapp and Edwin Ashby have spent some 
time in studying in the department during the year, and specimens 
were loaned to Mr. E. P. Chase, Dr. Paul Bartsch and Mr. J. B. Hen¬ 
derson. Mr. R. T. Jackson also borrowed some fossil mollusca. 
Insects. 
The department of Entomology has had the usual care and atten¬ 
tion given to it by those in charge. Dr. Henry Skinner and Mr. 
E. T. Cresson, Jr., have looked after all the orders except the Or- 
thoptera, which have had the attention of Mr. J. A. G. Rehn. The 
