266 PROCEEDINGS OF THE CALIFORNIA 



larv?e of an insect. They grew on and were all attached to the leaves 

 of the oak tree ; and at a certain stage of maturity, or from being 

 shaken by the wind, drop oiF. Mr. Brown had only noticed them 

 for the last three years, and said they always commenced dropping 

 off early in August. There were other oak trees in the vicinity, 

 but this was the only one on which they were found. Dr. E. S. 

 Holden had also noticed them on a particular oak for the past three 

 years, but had never seen the insect that produced them. 



The Vice-President stated that the Trustees had made au 

 arrangement for a special meeting to be held next week, in some 

 hall which would accommodate more people than the Academy 

 rooms, so that all of the members would have an opportunity to 

 hear Prof. Agassiz. The day and the hall would be announced 

 hereafter. 



Special Meeting, September 25th, 1872. 



President in the Chair. 



The rooms of the Academy being of insufficient size for the oc- 

 casion, this meeting was held at Pacific Hall, to enable the mem- 

 bers of the Academy and their friends to hear Professor Agassiz 

 once again, prior to his departure from the State. The hall was 

 well filled. After referring to the voyage of the " Hassler," and 

 the present aims of science, the Professor spoke for about an hour 

 on the " Natural History of the Animal Kingdom." A full report 

 of the lecture was published in the Overland Monthly^ Mining and 

 Scientifio Press, and other pubUcations in this city. 



