, CONTENTS. 



PAGE. 



Descriptions of some New Tineina, with Notes on a few. Old Species, . 

 by V. T. Chambers 179 



Three Approximate Solutions of Kepler's Problem, by II. A. Howe, 



A.M. 205 



On the Extra-Meridian Determination of Time, by Means of a Port- 

 able Transit Instrument, by Ormond Stone, A. M 211 



Silurian Ichnolites, with Definitions of New Genera and Species, by 



S.A.Miller 217 



North American Mesozoic and C;t!nozoic Geology and Pahcontology, 



by S. A. Miller 223 



Descriptions of New Crinoids from the Cincinnati Group of the Lower 

 Silurian, and the Subcarboniferousof Kentucky, by A. G. Wether- 

 by, A. M : 245 



Description of Two New Species from the Niagara Group, and Five 



from the Keokuk G roup, by S. A. Miller 254 



Note upon the Habits of some Fossil Annelids, by S. A. Miller, Esq. 260 



Terms : $2 00 per volume ; single number, 60 cents. 



