LIST OF CONTRIBUTORS, 



II7//( references to the several Articles contributed Iiy each. 



Austin, Coe F. Characters of some new Hepaticiv (mostly North Ameri- 

 can), togetliei' with Notes on a few imperfectly described species... 218 



Cope, E. D. Third Contribution to the Fauna of the Miocene Period of 



the United States 6 



A Review of the Species of the Plethodontida^ and Desmognathidse 93 



Coues, E. On variations in the Genus ^^giotlins 180 



On the Classification of Water Birds. -193 



Ennis, J. The Auroral Display of April 15, 186!i 173 



Lea, I. Notes on .Microscopic Crystals included in some Minerals 4 



Further Notes on Microscopic Crystals in some of the Gems 119 



Descriptions of Six New Species of Fresh-water Shells 124 



Leidy, Jos. Notice of some e.xtinct \"ertebrates from Wyoming and Dakota. 63 



Meehan, Thos. Se.xual Law in the Conifera? 121 



On the production of Bractea in Larix 176 



The Law of Development in the Flowers of Aml)rosia Artcmisitefolia. ... 189 



Meek, F. B , and A. H. Worthen. Description of new Crinoidea and Echi- 

 noidea, from the Carboniferous rocks of the Western States, with 



a Note on the Genus Onychaster 67 



Ridgway, R. Notices of certain ob.scurely known Species of American 



Birds 125 



Scammon. C. M. On the Cetaceans of the Western Coast of N. America.. 13 



) 8 3 /^ 



