BULLETIN No. 3, VOL. IV. 



TABLE OF CONTENTS. 



N'os. Titles. Pages. 



ART. XXV. — Field-notes on Birds observed in Dakota and Mon- 

 tana along the Forty-ninth Parallel dming the 

 seasons of 1873 and 1874. By Dr. Elliott Cones. 

 U. S. A., late Snrgeon and Naturalist U. S. 

 Northern Boundary Commission 545-662 



ART. XXVI. — Notes on a Collection of Fishes from the Rio Grande, 

 at Brownsville, Texas— Continued. By D. S. 

 Jordan, M. D 663-668 



ART. XXVIL— Preliminary Studies on the North American Pyra- 



lidse. I. By A. R, Grote 669-706 



ART. XXVIIL— Paleontological Papers No. 6 : Descriptions of New 

 Species of Invertebrate Fossils from the Laramie 

 Group. By C. A. White, M. D 707-720 



ART. XXIX.— Paleontological Papers No. 7 : On the Distribution 

 of MoUuscan Species in the Laramie Group. By 

 C. A. White. M. D 721-724 



ART. XXX.— On some Dark Shale recently discovered below the 

 Devonian Limestones, at Independence, Iowa; 

 with a Notice of its Fossils and Description of 

 New Species. By S. Calvin, Professor of Geology, 

 State University of Iowa 725-730 



ART. XXXL— On the Mineralogy of Nevada. By W. J. Hoff- 

 man, M. D 731-746 



