Annual Report.] 218 [May 3, 



Hyatt, A. On the Classification of Brachiopoda. June 1, 1870. 

 On Preservative Fluids. October 5, 1870. 

 On the Law of Acceleration in the development of certain types of 



animals. October 5, 1870. 

 On Revisions among the Ammonites. October 5, 1870. 

 On the Embryology of Nautiloids. November 9, 1870. 

 On Comparison of Soundings of East and West North American 



coasts. November 16, 1870. 

 On the Elevation and Depression of portions of the Atlantic coast. 



February 1, 1871. 

 On the affinity of the Polyzoa and the Brachiopoda. March 15, 



1871. 

 Remarks on Natural Selection. April 5, 1871. 



Jackson, C. T. On Meteorites. May 18, 1870. 

 On Lingula. June 1, 1870. 

 On an Analysis of the Rocks in the vicinity of Boston. October 



19, 1870. 

 On Glacial and Drift Phenomena. December 21, 1870. 

 On the Elevation and Depression of the Atlantic coast. Febru- 

 ary, 1871. 

 On some Peculiarities of Volcanic Action. February 15, 1871. 



Jackson, J. B. S. On Anatomical Preparations. October 5, 1870. 



Jeffries, B. Joy. On the Absence of Color-Perception in 

 Animals. April 5, 1871. 



Kneeland, S. On Optical Illusion. November 2, 1870. 



On the Geology and General Features of the country about the 



upper Mississippi. November 16, 1870. 

 On the mechanical action of Sand driven by a blast of air or 



steam. April 15, 1871. 

 On the Habits of Flying-fish off the Pacific Coast. March 15, 



1871. 

 On the Habits of some of the Pacific Water-birds. March 15, 



1871. 



Knight, C. F. On the Turtles of Florida. June 15, 1870. 



Maack. G. A. On the Geology of the Argentine Republic. 

 June 1, 1870. 



