308 American Association fo?^ the Advancement of Science. 



Remarlcs upon the Fnconforniity of the Paleozoic Formations of the IT. S. ; by 



Prof. L. Agassiz. 



Remarks upon the Fossils of the Potsdam Sandstone j by Prof. James Hall, N.Y. 



Geologist, Albany. 



Remarks upon the Fossil Corals of the genus Favosites, and alhed genera Favis- 

 tella, Astriocerium, and others ; by the same. 



Remarks upon the Trilobite of the Potsdam Sandstone, named by Dr. Owen, Di- 

 kellacephalus, and its relations to Asaphus and Ogygia ; by the same. 



On tlie Palieozoic genera, Trematopora, Cellopora, and allied genera of more recent 



geological periods ; by the same. 



Tracks, Trails, etc., in the Shules and Sandstone of the Clinton Group from Green 

 Bay, -with remarks on the thinning out and re-appearing of this portion of the Clin- 

 ton Group ; by the same. 



On some Reptilian Footmarks of the Infra-carboniferous Red Shale of Pennsyl- 

 vania ; by Prof. H. D. Rogers. 



On the Vegetation of the Infra-carboniferous Rocks of Pennsylvania, and a de- 

 scription of anew genus of Fossil Plants; by the same. 



On some Hew Fossil Plants of the Oolitic Coal of Eastern Virguiia ; by Prof. 

 W. B. Rogers. 



On the Alternations of Marine and Terrestrial Organic Remains in the Carbonife- 

 rous System of Ohio ; by J. W. Foster, 



On some Fossils of Northern Ohio ; by Prof. J. Brainerd. 



6. Zoology and Botany. 



On a ITew Type of Alternate Generation observed among Medusae ; by Prof. L- 

 Agassiz, 



Monograph of the Genera Dysnomia Ag., Complanaria Sw,^ Lampsilis Raf., and 

 general Remarks on the other Genera of Naiades ; by the same. 



^ Points in the Economy of the Cicada Sepiendecim, bearing upon the Plural Ori- 

 gin and Special Local Creation of the Species ; by Dr. W. J. Burnett, of Boston. 



Relations of Embryology and Spermatology to Animal Classification; by the 

 same. 



On the Geographical Distribution of Animals in California ; by Dr. J. L. Lk Conte 

 of New York. 



On the Classification of the Mammalia ; by C, Girard, of Washington. 



On the Habits of the Whale ; by Lieut. M. F. Maury, IT. S. N, 



On two New Species of Juglans ; by Prof. J. Torret. 



On the Chenopodiaceae of North America ; by the same. 



Views on the Nature of Organic Structure : by Lieut. E. B. Hunt, U. S. Engineers. 



7, Miscellaneous, 



On a New Form of Microscope, with a New Mode of Measurement of Dimensions 

 and Angles; by Prof. J. Lawrence Smith, of the Univ. of Louisiana, New Orleans. 



On the Aborigines of Nicaragua; by E. G. SomER. 



On the Distinctive Character of the Indians of California ; by Dr. J. L. Le Conte, 

 of New York. 



Description of samples of Ancient Cloth, from the Mounds of Ohio ; by J. '^- 



FOSTER. 



^ Additional facts respecting the Experiment by which a person can see the Arte- 

 ries of his own Eyes ; by Edward Hitchcock, Jr. 



Influence of the Poison of the Rattlesnake on Plants ; by Dr. J. H. Salisbury. 



On the Economical Uses of the Skin of the White Porpoise ; by T. S. Hunt, of 

 the Geological Commission of Canada. 



Proposal for a Trigonometrical Survey of New York; by Lieut. E. B. Hunt, IT.S- 

 Engineers. 



On the Proper Geometrical Form of the Mould Board of the Plough; by Rer. 

 Chas, Hack ley, of New York. 



Observations on the Freezing of Vegetables, and on the Causes which enable 

 some Plants to endure the action of extreme Cold; by Prof. John Le Conte, of the 

 University of Georgia. 



_ Peculiarities of the Climate, Flora, and Fauna, of the South Shore of Lake Erie, 

 m the vicinity of Cleveland, Ohjo; bv Dr. J. P. Kirtland, of Cleveland. 



On the Preservation of Animal Substances ; by Dr. H. Goadbt. 



