19 
The additions to the museum have not been extensive, the most 
important being the collection of invertebrates made by the Alas¬ 
kan and Siberian Expedition. 
Henry A. Pilsbry, Professor in the Department of Mol- 
lusca, reports that he has delivered two courses of lectures upon 
Malacology during the year. 
Several reports upon particular groups of mollusks, both recent 
and fossil, based upon material in the collection of the Academy 
have been prepared and published in the Proceedings, together with 
others based upon material sent for investigation from abroad. Pro¬ 
gress has been made in the classification and arrangement of the 
collection, the details of which may be found in the report of the 
Conservator of the Conchological Section. 
Henry Skinner, M. D., Professor in the Department of 
Insecta, reports fully on the condition of the entomological collec¬ 
tions, his statements being included in* the report of the Entomologi¬ 
cal Section. He will deliver six lectures in the Academy’s Lud- 
wick Institute Course early in the coming year. 
