White.] 180 



Introduction to the Study of International Law. By Theodore D. "Womsey. 

 8vo. New York, 1864. 



Religion and Chemistry. By Josiah P. Cooke, Jr. 8vo. New York, 1864. 



Elements of Chemistry. By William Allen Miller, M. D. 8vo. New York, 

 1864. 



Principles of Pohtical Economy. By John Stuart MiU. 2 vols. 8vo. New 

 York, 1864. 



A Supplement to Ure's Dictionary of Arts, Manufactures and Mines. Edited 

 by Robert Hunt. 8vo. New York, 1864. 



Death's Doings. Illustrations of thirty Copper Plates, designed and etched 

 by R. Dagley. 8vo. Boston, 1828. 



Evidence as to Man's Place in Nature. By Thomas Huxley, F. R. S. 8vo. 

 New York, 1863. Deposited by the Repvblican Institution. 



May 17, 1865. 



The President in the chair. 



Fifteen members present. 



The following paper was read : 



Observatioxs on the genus Belemnocrinus. By Charles 

 A. White, M. P. 



Examinations of more perfect specimens of the only yet discovered 

 species of Belemnocrinus, which came into my hands after I had pub- 

 lished a description and formula of that genus in the Proceedings of the 

 Boston Society of Natural History, have convinced me that I had inad- 

 vertently committed an error in designating the position of the first anal 

 plate. The diagram and description of the genus referred to are to be 

 found on pages thirteen and fourteen of volume nine of the Pro- 

 ceedings, for which I here substitute the following formula : 

 Genus Belemnocrinus, White. 

 Generic formula. 



Basal pieces, 5 ; short. 



Subradial pieces, 5 ; long, narrow, forming a more or less solid cylin- 

 der, which has however, a central perforation, and is more or less 

 excavated at its upper end, forming part of the visceral cavity. 



Radial pieces 5, more or less by 5. The first radials large, forming 

 the greater part of the calyx ; the others more or less cylindrical, form- 

 ing the bases of the arms. 



Anal pieces unknown. 



