28 



large number of the specimens in the older parts of the collections 

 which had been glued to card boards. These were in no danger of 

 being lost or materially damaged, but had cracked off and were 

 lying loose in the trays. It is probable, in consequence of the more 

 durable glue now used and the fact that the trays have reached 

 their final destination in the Museum, that this work will not 

 require to be done over again. 



The following papers were published during the year by the 

 assistants in this department : — 



Guides for Science Teaching, No. VIII. Insecta, by Alpheus Hyatt 

 and J. M. Arms. 323 pages, illustrated by 223 figures. D. C. Heath & 

 Co., Boston, 1890. 



The Next Stage in the Development of Public Parks. By Alpheus 

 Hyatt. Atlantic Monthly, February, 1891. 



Dall on Dynamical Influences in Evolution. By R. T. Jackson. Am. 

 Nat., October, 1890. 



Studies of Pelecypoda. By Robert Tracy Jackson. Am. Nat., 

 December, 1890, p. 1132. 



The Mechanical Origin of Structure in Pelecypods. Am. Nat., January, 

 1891, p. 11. 



