-76 [June, 1843. 



Address delivered at the anniversary meeting of the Geolo- 

 gical Society of London, on 17th February, 1843, pre- 

 faced by the announcement of'the award of two Wollaston 

 medals, and the Donation Fund for the same year. By 

 Roderick Impey Murchison, F. R. S., &c. London, 1843. 

 From the Author. 



On the distribution and classification of the older or palseozic 

 deposits of the North of Germany and Belgium, and on 

 their comparison with formations of the same age in the 

 British Isles. By the Rev. Adam Sedgewick, F. R. S., 

 F. G. S., &c, and Roderick Impey Murchison, F. R. S., 

 F. G. S.,&c. 4to. Accompanied by a 4to. volume of engrav- 

 ings illustrative of the text. London, 1842. From the 

 Authors. 



Manuscript Lectures on various subjects of Natural History 

 and Natural Philosophy. By Redmond Conyngham, of 

 Lancaster county, Pennsylvania. From the Author. 



WRITTEN COMMUNICATIONS. 



A letter was read from the Secretary of the Zoological 

 Society of London, acknowledging the receipt of the Pro- 

 ceedings of the Academy. 



VERBAL COMMUNICATIONS. 



Dr. Mortem, (upon resigning the chair to Dr. Goddard,) commu- 

 nicated some interesting information respecting the Cicada septem- 

 decim, or seventeen year locust, which, during a recent journey 

 from Rahway to Haddonfield, in the State of New Jersey, he had 

 observed in very great numbers. They made their appearance 

 there three or four weeks since, and were chiefly to be found in the 

 tract of country lying between the two places mentioned, not ex- 

 ceeding fifty miles in extent. In one apple orchard the trees were 

 literally loaded with them ; some trees Dr. M. supposed to contain 

 not less than two thousand. The foliage or other vegetation, so far 

 as his observatien extended, had as yet sustained no perceptible 

 injury from them ; and naturalists were still undecided with re- 



