Ixxxvi 

 September 2, 1872. 



Dr. Engelmann, Vice-President, in the chair. 



Mr. C. V. Riley read a paper for publication, entitled " On a 

 new genus in the Lepidopterous Family, TineidcB^ with Remarks 

 on the Fertilization of Yucca." Referred to the Committee on 

 Publication. 



The Secretary presented to the Academy, on behalf of Mr. Ed- 

 win Harrison, a life-size photograph of the late Dr. Benjamin F. 

 Shumard, 



September 16, 1872. 



Albert Todd, Esq., Vice-President, in the chair. 



Fourteen members present. 



The Corresponding Secretary reported exchanges received and 

 deposited in the Library. 



Letters were read from the Mercantile Library of Baltimore, 

 and from the Illinois Museum and Library, asking for copies of 

 the Transactions of the Academy, and were referred to the Libra- 

 rian to be complied with as far as practicable. 



Dr Engelmann read a communication from Mr. G. C. Broad- 

 head, of the State Geological Survey, concerning ancient mounds 

 andcircumvallations discovered in the County of Saline, Missouri. 

 He stated that when recently at Miami, he had visited an interest- 

 ing locality four miles southward of that place, where he observed 

 an ancient walled fortification on high ground in a dense wood. 

 It was about a quarter of a mile in diameter, somewhat circular, 

 but varying with the ravines making from the hill, and becoming 

 re-entrant at such places. Around this space extended a double 

 wall and a double ditch, with a flattened ridge on either side, 

 showing in the cross section, first, alow ridge 10 feet wide and ij 

 feet high ; then a depression 10 feet wide and 3 feet deep ; then a 

 ridge 8 feet wide and 3 feet high ; and then a depression 6 feet 

 wide and 3 feet deep, rising into another ridge 8 feet wide and 

 3 feet high. The two last mentioned ridges extended entirely 

 around the included area, and were built wholly of earth taken 

 from the ditches. No rock was seen near. Black-oak trees three 



