205 



surface with from twenty to twenty-five rounded, concentric folds, 

 becoming indistinct on the posterior part of the shell. There are 

 also many fine, concentric lines of growth visible to the naked eye. 



Length, 3^ inches ; width, 1^ inches ; thickness, 6^ Hnes. 



Kipley Group, Chatfield Point, Navarro County. 



A letter was read from Mr. I. A. Lapham, of Milwaukee, 

 announcing that massive datholite, from Lake Superior, (see 

 present volume of Proceedings, p, 61,) had been previously 

 analyzed and described in Silliman's Journal, vol. xxviii. 

 1859, by Mr. J. D. Whitney. 



A letter was read from Mr. Amos Binney to the President, 

 dated August 15, 1861, resigning the office of Treasurer of 

 the Society, which he had held for the last four years, as 

 he had entered the service of the United States. 



Major Binney's resignation was accepted, and on motion 

 of Dr. C. T. Jackson, the thanks of the Society were voted 

 to him for the able and efficient manner in which he had dis- 

 charged the duties of Treasurer during the last four years. 



The Council, during the vacation of the Society, having 

 voted to nominate Mr. T. T. Bouve as a candidate for the 

 office of Treasurer, he was unanimously elected. 



The Corresponding Secretary read the following letters, 

 namely — 



From Dr. S. Weir Mitchell, Philadelphia, January 29 ; James 

 Anderson, February 19 ; Charles H.Hitchcock, Amherst, April 17; 

 accepting membership. 



From T. Apoleon Cheney, Cherry Creek, N. Y., in behalf of the 

 Georgic Library of that place, asking for the publications of the 

 Society; the Entomologischer Verein zu Stettin, October 15, 1860, 

 in acknowledgment of a donation from the Society, and promising to 

 reciprocate; Dr. D. F. Weinland, Frankfort a M. announcing dona- 

 tion of " Zoiilogische Garten," Nos. 1-12; H. Crosse, editor of the 

 Journal de ConchyHologie, Paris, May 1, proposing an exchange of 

 pubhcations ; Societe Entomologique de France, June 10, acceding 

 to a proposition on the part of the Society for an exchange of publica- 

 tions. From the Societe Royale des Sciences de Liege, July 12, 1860 ; 

 the K. Universitat, Gottingen, November 7, 1860; the Academic des 

 Sciences, Paris, November 2, 1860; the K. Akademie der Wissen- 

 schaften, Wicn, December 18, 1860; the Royal Geographical Society, 

 London, January 10 and March 2, 1861 ; the Naturhistorischer 

 Verein, Bonn, January 23, 1861 ; Reports of the University of New 



