136 



REPORT OF NATIONAL MUSEUM, 1908. 



Merrill. George P. — (."(nitimu'd. 



iiudersone more extensive chemical 

 decompositions. 



Mr. Tassin jjives analyses of the 

 shale-ball irons, the oxidized por- 

 tions of such a ball, and compares 

 them with earlier analyses of the 

 typical Canyon Diablo iron and of 

 oxidized shale balls. Finding little 

 or no ferrous oxide, he regards 

 the shale as composed essentially 

 of limonite with some turgite, 

 and that its magnetic property 

 is, in part at least, due to 

 unaltered schreibersite visible in 

 many sections. Analyses are also 

 given of the mineral components of 

 the iron-taenite, colienite. schreiber- 

 site in two varieties, a black non- 

 magnetic residue, and olivine. 



Tassix. Wirt. [Analysis of a new 

 variety of sericite.] The Granites 

 of Maine (by T. Nelson Dale). 



Bull. U. 8. Geol. Sun:, No. .'51.'?, 

 1007, pp. 46, 47. 

 From a quartz vein at Boldwell 

 Company's quarry. Cooks Mountain, 

 Redbeach, Calais, Me. In fine 

 scales when compacted resembles 

 serpentine. Luster pearly. Color 

 greenish - yellow. Hardness, 2. .5. 

 Density, 2.79. Composition : SiOo, 

 53.28; AloOg. 2.3.06; Fe^Co, O.io'; 

 FeO, 4.30; MgO, 4.09; NaaO, 0.65; 

 K2O, 8.90; H2O, 6.00. 



(See also nnder Edwin E. 



Howell and George P. Merrill.) 



PALEONTOLOGY. 



Anderson. Kobert. (See under Kalpli 



Arnold.) 

 Arnold, Ralph. Geology and oil re- 

 sources of the Summerland district, 

 Santa Barbara County, Cal. 



Bull. V. 8. Geol. 8urr., No. 321. 



1907, pp. 1-93^ pis. i-xvii. 



figs. 1-3. 



The characteristic fossils of the 



district are here illustrated to aid 



in the identification of the oil 



horizons. A plate by Dr. R. S. 



Bassler, illustrating the bryozoa of 



the Fernando formation is included. 



The specimens illustrated are the 



property of the National Museum. 



New and characteristic species 



of fossil mollusks from the oil- 

 bearing Tertiary formations of Santa 

 Barbara County, Cal. 



Smithsonian Misc. Colls., l, 

 Quar. issue. Pt. 4, No. 17S1. 

 Dec. 13. 1907, pp. 419-447, 



pis. L-LVIII. 



Describes and figures the charac- 

 teristic fossil mollusks from these 

 formations. The species are ali 

 new. and the types with one excep- 

 tion are the property of the Na- 

 tional Museum. 



— and Anderson, Robert. Geol- 

 ogy and oil resources of the Santa 

 Maria oil district, Santa Barbara 

 County. Cal. 



null U. 8. Geol. Suit-.. No. 322, 

 1907, pp. 1-161, pis. i-xxvi. 

 Illustrates the characteristic fos- 

 sils to aid in the determination of 

 the horizon. The specimens illus- 

 trated are the property of the Na- 

 tional Museum. 



Arnold, Ralph. (See also under 



George Homans Eldridge.) 

 Bassler, Ray S. (See under E. O. 



T'lrich.) 



Eldridge, George Homans, and Arnold, 

 Ralph. The Santa Clara Valley, 

 Puente Hills, and Los Angeles oil 

 districts, Southern California. 



Bull. V. 8. Geol. Surv., No. 309, 

 1907, pp. 1-266, pis. i-xLi, 

 figs. 1-17. 

 Figures many Museum specimens 

 from these districts to aid in the 

 identification of the various forma- 

 tions. 



Gidley, James Williams. Revision 

 of the Miocene and Pliocene 

 Equidae of North America. 



Bull. Amer. Miis. Nat. Hist., 



XXIII, art. 35, Nov. 26, 1907, 



pp. 865-934. 



A revision of the genera and 



species, and a rearrangement and 



reidentiflcation of the subfamilies, 



or groups, of the Equidae have here 



been made, and several new species 



are described. 



Gilmore, Charles W. . Smithsonian 

 explorations in Alaska in 1907 in 

 search of Pleistocene fossil verte- 

 brates. 



Smithsonian Misc. Colls., Li, No. 

 1S07, May 27, 1908. pp. 3-38, 

 pis. i-xiii, flgs. 1-4. 

 Describes the results of the second 

 expedition sent to Alaska in search 

 of fossil vertebrates under the 

 auspices of the Smithsonian Insti- 

 tution, followed by a brief review 

 of the Pleistocene fauna of that 

 region. 



