LIST OF PUBLICATIONS. 



143 



Rose, J. N., and J. A. Purpus. Three 

 new species of Echeveria from southern 

 Mexico. 



Contr. U. S. Nat. Herb., 13, Pt. 2, 

 Feb. 21, 1910, pp. 45, 46, pis. 

 10-14. 



(See also under N. L. Britton and 



J. M. Coulter.) 



Underwood, Lucien M., and William 

 R. Maxon. Cyatheaceae [of North 

 America]. 



North Amer. Flora, 16, Nov. 6, 

 1909, pp. 65-68. 

 Includes treatment of the genus Cya- 

 thea, with 3 new species. 



GEOLOGY AND MINERALOGY. 



Bassler, R. S. The cement resources of 

 Virginia west of the Blue Ridge. 



Virginia Geol. Surv., Bull. Xo. 

 2-A, 1909, pp. 1-309, pis. 1-30, 

 figs. 1-30. 

 This report deals essentially with the 

 limestones and shales— the cement-mak- 

 ing rocks — of Appalachian Virginia, 

 although the stratigraphy of all the rocks 

 has been descril)ed in some detail. The 

 Cambro-Ordovician rocks have received 

 most attention, although the post-Ordo- 

 vician rocks are discussed. Since practi- 

 cally nothing concerning the Paleozoic 

 fossils of Virginia has appeared in the 

 literature, plates of fossils, based upon 

 Museum specimens, are inserted. 



Merrill, George P. A heretofore unde- 

 scribed stony meteorite from Thomson, 

 McDuffie County, Ga. 



Smithsonian Misc. Colls., 52, 

 Qnar. issue, Pt. 4, No. 1881, 

 Dec. 2, 1909, pp. 473-476, pis. 

 52, 53. 

 Describes briefly the mineral composi- 

 tion and structure of the stone and calls 

 attention to an apparent case of secondary 

 filling of a vein cavity by pyrite. 



Peale, Albert C. On the application 

 of the term Lararnie. 



Amer. Journ. Sci., 4th ser., 28, 

 July, 1909, pp. 45-58. 



Pogue, Joseph E. Geology and struc- 

 ture of the ancient volcanic rocks of 

 Davidson County, N. C. 



Amer. Jovrn. Set., 28, Sept., 

 1909, pp. 218-238, flgs. 1-3. 

 The geology of a portion of the Pied- 

 mont Plateau of North Carolina, compris- 

 ing the beveled folds of a great volcano- 

 sedimentary series, is given. The follow- 

 ing rock types are described: slate, acid 

 fine tuff, acid coarse tuff, acid volcanic 

 breccia, rhyolite (with chemical analysis), 

 dacite (with chemical analysis), andesitic 

 fine tuff, andesitic coarse tuff and breccia, 

 andesite (with chemical analysis), gabbro, 

 and diabase (with chemical analysis). 

 The article concludes with a discussion of 



Pogue, Joseph E. — Continued. 



the structure and geologic history. It is 

 based partly on material in the U. S. 

 National Museum. 



Crystallographic notes on calcite. 



Smithsonian Misc. Calls., 52, 

 Quar. issue, Pt. 4, No. 1878, 

 Sept. 24, 1909, pp. 4G5-468, pis. 

 53, 54. 

 Crystallographic descriptions of (1) two 

 specimens calcite from Joplin, Mo., (2) 

 caloite with moving bubble from Guana- 

 juato, Mexico, and (3) small crystals of 

 calcite from Virgilina, Va. 



On a remarkable cube of pyrite, 



carrying crystallized gold and galena of 

 unusual habit. 



Smithsonian Misc. Cells., 52, 



Quar. issue, Pt. 4, No. 1882, 



Dec. 22, 1909, pp. 477-484, pi. 59, 



figs. 81-85. 



A description, with consideration of its 



crystallographic features, of a 2-inch cube 



of pyrite from Jvmeau, Alaska, the surface 



of which is studded with easily visible, 



clear-cut crystals of native gold and partly 



covered with plates of galena unusually 



laminated. 



On olivine-diabase from Davidson 



County, N. C. 



Proc. U. S. Nat. Mm., 37, No. 

 1715, Jan. 19, 1910, pp. 475-484, 

 pi. 37. 

 A petrographic description, including a 

 discussion of the chemical composition, a 

 classification according to the quantita- 

 tive system, and the literature on olivine- 

 diabase occuiTing in the United States. 



On sand-barites from Kharga, 



Egypt 



Proc. U. S. Nat. Mus., 38, No. 

 1726, Apr. 30, 1910, pp. 17-24,- 

 pl. 9, 1 fig. 

 An account of the crystallographic, mi- 

 croscopic, and chemical character of a 

 large suite of crystals from the Libyan 

 Desert of northeast Africa. Includes a 

 review of the literature on sand barites 

 and baritic sandstones. 



