LIST OF CONTRIBUTORS. 



With reference to the several articles contributed by each. 



For "Verbal Communications, see Greneral Index. 



Arango, Rafael. Description ef new species of Terrestrial MoUusca of 



Cuba 15 



Buckley, S. B. Quercus Durandii Buckley 121 



Quercus rubra L. var. Texana 123 



Rhus cotinoides Nutt 125 



Chapman, Henry C, M. D. Observations upon the Hippopotamus 126 



On a Foetal Kangaroo and its Membranes 468 



Heilprin, Angelo. Notes on the Tertiary Geology of the Southern 



United States , 157 



A Revision of the Cis-Mississippi Tertiary Species of the United 



States 416 



Remarks on the Molluscan Genera Hippagus, Verticordia and 



Pecchiolia 423 



Note on the Approximate Position of the Eocene Deposits of Mary- 

 land 444 



A revision of the Tertiary Species of Area of the Eastern and South- 

 ern United States 448 



Lockington, W. N. List of the Fishes collected by Mr. W. J. Fisher, 

 upon the coast of Lower California, 1876-77, with descriptions of 



new Species 113 



McCook, Rev. H. C. The Honey Ants of the Garden of the Gods 17 



The snare of the Ray Spider (Epeira radiosa), a new form of Orb- 

 web 163 



Ryder, John A. The Structure, AfBnities and Species of Scolopendrella. 79 



Stearns, R. E. C. Observations on Planorbis 92 



Wachsmuth, Chas. and Frank Springer. Revision of the Palseocrinoidea. 



Part II, Family Spheeroidocrinidse 177 



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