OF ARTS AND SCIENCES : AUGUST 10, 1864. 347 



constatees sur des Ossements de Mammiferes Fossiles des Environs 

 de Chartres. (Extr. des Compt. Rend, de rAcademie des Sciences. 

 T. 56. Seance du 29. Juin, 1863.) 4to pamph. Pans. 1863. 

 Henri de Saussure. 



Etudes sur le Metamorphisme des Roches, par M. Delesse. Tir^ 

 de la Bibliotheque Universelle et Revue Suisse [Archives des 

 Sciences Phys. et Nat.] livr. d'Avr. 1863. T. XVI. 8vo 

 paraph. 



Ephemeriden der seit 1845 entdeckten Planeten fur das Jahr 

 1864. Supplement zu dem Berliner Jahrbuch fur 1866. 8vo vol. 

 Berlin. 1864. 

 T. C. Winkler. 



Mus^e Teyler. Catalogue Syst^matique de la Collection Pal^on- 

 tologique. 1st Part. 8vo pamph. Harlem. 1863. 

 Prof. C. Hansteen. 



Magnetiske Jagttagelser paa Island og Spitsbergen. 8vo pamph. 

 Christiania. 



Resultate Magnetischer, Astronomischer, und Meteorologischer 

 Beobachtungen auf einer Reise nach dem Oestlichen Sibirien, in 

 den Jahren 1828 -30. 4to vol. Christiania. 1863. 



Five hundred and tliirty-seventh Meeting. 



August 10, 1864. — Statute Meeting. 



The President in the chair. 



The President read letters from Mr. R. W. Emerson and 

 Dr. J. B. Upham, in acknowledgment of their election into 

 the Academy. 



The following paper was presented by the President : — 



Synopsis of North American GaurinecB. By J. T. Rothrock. 



In an examination of Gaura coccinea, I noticed an appendage at 

 the base of each filament, and an indusium surrounding the stigma. 

 Both these characters appearing to us at the time not to have been 

 observed before, at the suggestion of Professor Gray I undertook to 

 see how far they could be turned to account in the classification of 



