Bibliographical Notices. 217 



scope and such j^eneral excellence, and we can only hope that a fifth 

 edition may soon be reached in which they can be attended to, and 

 that the botanical students of the next thirty years may continue 

 to have, as we have had, their ' Ilenfrey ' kept well up to date. 



G. S. BoULGEE. 



Second Annual Report of the United-States Geological Surveij to the 

 Secretanj of the Interior, 1880-81. By J.W, Poavell, Director, 4to. 

 Pp. 583, with a large map, 61 plates of views, maps, and dia- 

 grams, and 32 woodcuts of views, sections, and diagrams. AVash- 

 ington : 1882. 



This handsome and comjirehensive volume contains : — I. The 

 Director's lleport, both general, on the Survey and its work, and 

 special, on the research and results of each Head-Surveyor and his 

 subordinates. II. Administrative Ileports by the several Heads of 

 Divisions. Ill, The Ileports and Memoirs themselves, supplied by 

 the officers and other members of the Survey. 



The Director, in his Report on the " Plan of Publication " and 

 " General Considerations," treats both of the nomenclature of the 

 geological divisions, as proposed and used by Dana, Le Conte, and 

 the Survey, and of a uniform system of colours proposed for geo- 

 logical cartography. 



1. The first lleport is on the Tertiary History of the Grand-Canon 

 District, by Captain C, E. Dutton, Of this a notice, together with 

 the expression of the writer's high opinion of its great worth, has 

 already appeared in the ' Philosophical Magazine,' 1884, aer. 5, 

 vol. xvii. p. 551. 



2. The History of Lake Bonneville, by Mr. G. K. Gilbert, who has 

 arrived at the opinion that " first, the waters were low, occupying, 

 as Great Salt Lake now does, only a limited portion of the bottom of 

 the basin. Then they gradually rose and spread, forming an inland 

 sea nearly equal to Lake Huron in extent, with a maximum depth 

 of 1000 feet. Then the waters fell, and the lake not merely 

 dwindled in size, but absolutely disappeared, leaving a plain even 

 more desolate than the Great-Salt-Lake Desert of to-day. Then 

 they again rose, surpassing even their former height, and eventually 

 overflowing the basin at its northern edge, sending a tributary 

 stream to the Columbia River, And last, there was a second reces- 

 sion, and the water shrank away — until now only Great Salt Lake 

 and two smaller lakes remain," Thus, " there were two epochs of 

 excessive moisture or else of excessive cold, separated by an interval 

 of superlative dryness, and preceded by a climatic period com- 

 parable with the present." The first term of wetness was the 

 longer, and the second was the more intense. 



3. The Geology of the Eureka District, by Mr. Arnold Hague. 

 Ann. & Mag. N. Hist. Ser. 5. Vol. xiv. 17 



