— 543 — 



19) Report of th;e Director (J. W. Powell) of the United States 

 geological Sur vey for the fiscal-year ending June 80. 1881. 

 4°. Washington 1882. 



C. E. Dutton: The physical geology of the Grand Cannon District. 

 49—168. — G. K. Gilbert: Contribution to the history of Lake Bonne- 

 ville. 169—202. — S. F. Emmons: Abstract of Report on geology and miriing 

 industry of Leadville, Lake County, Col. 203—292. — Geo. F. Becker: 

 A summary of the geology of the Comstock Lode and the Washoe District. 

 298—332. — Clarence King: Production of the precious metals in the Uni- 

 ted States. 333—404. — G. K. Gilbert: A new method of measuring heights 

 by means of the barometer. 405 — 565. 



20) Proceedings of the Bo ston Society of natural history. 8°. 

 Boston 1882. [Jb. 1882. I. -470-] 



Vol. XXI. part 2 and 3. December 1880 — January 1882. — W. 0. 

 Crosby: Geology of Frenchman's Bay. 113. — Wm. M. Davis: Remarks 

 on the geology of Mt. Desert, Me. 117. — M. E. Wadsworth: The appro- 

 priation of the name Laurentian by the Canadian geologists. 121. — 

 F. W. Putnam: Palaeolithic implements from Wakefield, Mass. 122. — 

 C. C. Abbot: Historical sketch of the discoveries of palaeolithic implements 

 in the Delaware Valley. 124. — H. W. Haynes: The argillite implements 

 of the Delaware gravels compared with the palaeolithic implements of 

 Europe. 132. — G. Fred. Wright: An attempt to estimate the age of the 

 palaeolithic-bearing gravels in Trenton, N.-J. 137. — Carr, Wadsworth 

 and Putnam: Remarks on the preceeding subjects. 141. — J. W. Dawson: 

 Note on Spirorbis contained in an ironstone nodule from Mazon Creek. 

 157. — N. S. Shaler: On the recent advances and recession of glaciers. 

 162. — S. H. Scudder: On Lithosialis bohemica. 167. — J. S. Diller: On 

 the felsites of the vicinity of Boston. 168. — M. E. Wadsworth: A micro- 

 scopic study of the Cumberland iron ore of Rhode Island. 194. — W. W. 

 Dodge: Notes on the geology of eastern Massachusetts. 197. — N. F. 

 Merrill: Concerning the lithological collection of the exploration of the 

 40 th parallel. 234. — M. E. Wadsworth: Some points relating to the 

 geological exploration of the 40 th parallel. 243; — The relation of the 

 Quincy granite to the primordial argillite of Braintree , Mass. 274. — 

 W. 0. Crosby: The Classification of textures and structures of rocks. 280. 

 — M. E. Wadsworth: On the trachyte of Marblehead, Mass. 306. — 

 Edw. S. Morse: The variations of the shells of the Kjoekenmoeddings. 

 307. — M. E. Wadsworth: On picotite from Mt. Shasta, Cal. 314. — 

 W. M. Davis: On the Classification of lake basins. 315. 



21) Memoirsofthe Boston Society of natural history. [Jb. 1881. 

 I. -163-] 



Vol. III. part 2. No. 5. May 1882. — Sam. H. Scudder: Archipolypoda, 

 a subordinal type of spined myriapod, from the carboniferous formation . 



