LIST OF CONTRIBUTORS, 



With reference to the several articles contributed by each. 

 For Verbal Communications see General Index. 



Berthoud, E. L. On Prehistoric Human Art from Wyoming and Co- 

 lorado 46 



Bland, Thos. and W. G. Binney. Notes on Lingual Dentition of Cer- 

 tain Species of American Land Shells 135 



Conrad, T. A. Descriptions and Illustrations of Genera of Shells. ... 50 

 Descriptions of a New Recent Species of Glycimeris, from Beaufort, 



N. C, and of Miocene Shells of North Carolina 216 



Cooper, J. G. On New Californian Pulmonata, etc 143 



Cope, E. D. List of the Reptilia of the Eocene Formation of New 



Jersey 14 



Synopsis of the Species of the Chelydrinae 22 



On an Extinct Whale from California 29 



Coues, Elliott. Studies of the Tyrannidse. Part I. Revision of the 



Species of Myiarchus 56 



Material for a Monograph of the Spheniscidse 170 



Finsch, Dr. O. Remarks on the "Synopsis of the Genus Chettusia 

 (Lobivanellus) with a Description of a New Species by J. A. 



Ogden" 32 



Gabb, Wm. M. Notes on the Genus Polorthus, Gabb 259 



Notice of a Collection of Cretaceous Fossils from Chihuahua, Mexico 2(53 



Description of some new Genera of Mollusca 270 



Lea, Isaac. Descriptions of Twenty-nine Species of Unionidse from the 



United States 155 



Lewis, James. Shells of Herkimer and adjacent Counties in the State 



of New York 97 



Shells of Tennessee (No. 2. ) 108 



Meehan, Thos. On Numerical Order in the Branching of some Coni- 



ferse 33 



On the Agency of Insects in Obstructing Evolution 235 



Streets, T. Hale. Notice of some Crustacea from the Island of St, 



Martin, W. I., collected by Dr. Van Rijgersma 131 



