IV. LIST OF CONTRIBUTORS. 



Gunther, Alb. Some remarks on Labrus pulcher (Ayres) 77 



Helmutb, C. A. New species of Mordellidee collected in Illinois 96 



Lawrence, Geo. N. Descriptions of new species of Birds of the Families 

 Paridae, Vireonidas, Tyrannidae and Trochilidae, with notes on 



Myiarchus Panamensis , 37 



Descriptions of four new species of Birds from the Isthmus of Panama, 



New Granada 106 



Lea, Isaac, Descriptions of Three New Species of Exotic Uniones 75 



Descriptions of Eight New Species of Unio of the United States 88 



Le Conte, Dr. J. L. Note on the Species of Myodites, Latr., inhabiting the 



UnitedStates 96 



Notes on the Species of Harpalus inhabiting America north of Mexico... 98 

 On the Species of Galeruca and allied Genera inhabiting North America, 204 

 Prodromus of a Monograph of the Species of the Tribe Anobiinii of the 



Family Ptinidae, inhabiting North America 222 



Lewis, Dr. F. W. On Extreme and Exceptional Variations of Diatoms, in 



some White Mountain localities 7 



Meek, F. B., and A. H. Worthen. Notice of some New Types of Organic 



Remains, from the Coal Measures of Illinois. 41 



Remarks on the Genus Taxocrinus (Phillips) McCoy, 1844; and its rela- 

 tions to Forbesiocrinus, Koninck and Le Hon, 1854, with descrip- 

 tions of New Species 138 



Descriptions of New Species of Crinoidea, &c, from the Palaeozoic Rocks 



of Illinois and some of the adjoining States 143 



Descriptions of New Crinoidea, &c, from the Carboniferous Rocks of 



Illinois and some of the adjoining States 155 



Note on the Genus Gilbertsocrinus, Phillips, by F. B. Meek... 166 



Contributions to the Palaeontology of Illinois and other Western States, 245 

 Observations on the Microscopic Shell Structure of Spirifcr cuspidatus, 



Sowerby, and some similar American Forms, by F. B. Meek 275 



Tryon, Geo. W. Synonomy of the Species of Strepomatidae, a Family of 



Fluviatile Mollusca inhabiting North America. Part 4 19 



Winchell, Alex. Descriptions of New Species of Fossils, from the Marshall 

 Group of Michigan, and its supposed Equivalents in other States ; 

 with Notes on some Fossils of the same Age previously described, 109 



Wood, Dr. H. C. New Polyzonidas * 172 



Worthen, A. H. See Meek. 





