126 Notices of Memoirs. 



22. GhUgerina cretacea, D'Orb | ^ Globigebina. 



23. margmata, ileuss. ) 



24. Flanorhulina ammonoides^Reuss. ) g^ Planorbulina. 



25. Planuhna arimmensis, u (Jrb. ) 



26. PulvinuUna Mieheliniana, D'Orb. 7. Pulvintilina. 



27. Rotalia umbilicata, D'Orb. 8. Eotalia. 



IsTOTICES OIP HVCEDVUOIIS/S. 



I. — Geology of New Hampshire. 



IN 1868 a Geological Survey of the State of New Hampsliire, U.S.A., 

 was ordered by the Legislature. C H. Hitchcock was ap- 

 pointed Director ; J. H. Huntington, G. L. Vose, Geological Assis- 

 tants ; C. A. Seely, Chemist; and Arthur M. Edwards, Microscopist. 

 Three brief annual reports of progress have been made, amounting 

 in the aggregate to 155 pages octavo, with two maps ; the first of 

 the Ammonoome Gold Field, and the second one of the whole State, 

 upon the scale of ten miles to the inch, designed to show the distri- 

 bution of granite and the progress of triangulation for the year 1870. 

 The latter map shows nine geological distinctions. 



The work performed has been geological, topographical, and me- 

 teorological. As no good maps existed, the first object aimed at was 

 the determination of the exact geodetical points by triangulation. 

 Using the stations of the Coast Survey for a basis, E, T. Quimby and 

 G. L. Vose made satisfactory progress in establishing the latitudes and 

 longitudes of several prominent mountain peaks. The former 

 gentleman is continuing the work under the direction of the United 

 States Coast Survey, who are authorized by Congress to expend funds 

 for triangulation in all interior States where Geological Surveys are 

 in progress. A new map of the whole State, upon the scale of two 

 miles and a half to the inch, which will serve as the basis for the 

 geological delineation, is nearly ready for the engraver. Models of 

 the White and Franconia Mountains have been executed in plaster, 

 upon a large scale. 



The second report gives a general classification of the rocks. The 

 geology of this State is so intricate that no one has ever attempted to map 

 the formations. Maps of the northern part of the Continent, such as 

 Logan's, leave this territory entirely blank, unless they be on a minute 

 scale like Lyell's, or E. Hitchcock's maps of the United States (1853), 

 where it all appears as ^' Primary." It has, however, been the field 

 for conflicting theories. We have first the ancient idea of a central 

 granitic nucleus, illustrated by Jackson's Eeport and all earlier writers. 

 Succeeding this came a general belief that the gneisses and granites 

 were " Primary." Subsequently most American geologists adopted 

 the theory that the New England gneisses were all metamorphosed 

 Palaeozoic strata ; and Logan, Sterry Hunt and J. P. Lesley are on 

 record as affirming the rocks of the White Mountains to be Devonian. 

 The researches of the present Survey indicate a return to the older 

 view that these rocks are largely Eozoic. The discoveries of the 

 past year (1871), not yet reported, seem to confirm the anticipations 



