LIST OP CONTRIBUTORS. 



With reference to the several (irtieles contributed by each. 



For Verbal Communications see General Index. 



■Cope, E. D. Notes on the Geographical Distribution of Batrachia and 



ReiJtilia in Western North America 10 



On a new Extinct Genus of Sirenia from South Carolina 52 



On the Mutual Relations of the Bunotherian Mammalia 77 



On the Characters of the Skull in the Hadrosauridae 97 



On some Vertebrata from the Permian of Illinois 108 



On the Fishes of the Recent and Pliocene Lakes of the Western 



Part of the Great Basin, and of the Idaho Pliocene Lake 134 



Cresson, H. T. Aztec Music 86 



Evermanu, B. W., and Seth E. Meek. A Review of the Species of 



Genes found in American Waters 116 



Heilprin, Angelo. Note on a Collection of Fossils from the Hamilton 



( Devonian) Group of Pike Co., Pa 213 



On the Value of the " Nearctic " as one of the Primary Zoological 



Regions. Replies to Ci'iticisms by Mr. Alfred Russel Wallace 



and Prof. Theodore Gill 266 



Hoopes, Josiah. Pinus Koraiensis Sieb. and Zucc 114 



Jordan, David S. Notes on American Fishes preserved in the 



Museums at Berlin, London, Paris and Copenhagen 281 



Leidy, Jos. Manayunkia speciosa 204 



Lewis, Graceanna. On the Genus Hyliota 128 



McCook, Rev, Henry C. The Occident Ant in Dakota 294 



Martiudale, Isaac C. Obituary Notice of Charles F. Parker 260 



Mitchell, Chas, L. Staining with Hsematoxylon 297 



Mohr, Charles. On Quercus Duraudii Buckley 37 



Osborn, Henry F. Preliminary Observations upon the Brain of 



Amphiuma 177 



Parker, Andrew J. Reproduction in Ami^hileptus fasciola 313 



Rand, Theo. D. Note on the Geology of Chester Valley and Vicinity. 241 

 Randolph, N. A. A Study of the Distribution of Gluten within the 



Wheat Grain 308 



Sharp, Benj. On the Anatomy of Ancylus fluviatilis O. F. Miiller and 



Ancylus lacustris Geoifroy 214 



Stearns, R. E. C. Description of a new Hydrobiinoid Gasteropod from 



the Mountain Lake of the Sierra Nevada, with Remarks on 



Allied Species aud the Physiographical Features of said Region. 171 

 Townsend, Charles H. Notes on the Birds of Westmoreland County, 



Penna 59 



Willcox, Jos. Notes on Glacial Action in Northern New York and 



Canada 257 



IV^ right, Berlin H. A new Unio from Florida 58 



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