136 
Merritt, Greorce P.—Continued. 
undergone more extensive chemical 
decompositions. 
Mr. Tassin gives analyses of the 
shale-ball the oxidized  por- 
tions of such a ball, and compares 
irons. 
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  Jeast, due to 
unaltered schreibersite visible in 
many sections. Analyses are also 
given of the mineral components of 
the iron-taenite, cohenite, schreiber- 
site in two varieties, a black non- 
magnetic residue, und olivine. 
REPORT GF NATIONAL MUSEUM, 1908. 
TASSIN, Wirt. [Analysis of a new 
variety of sericite.|) The Granites 
of Maine (by T. Nelson Dale). 
Bull. U. 8. Geol.-Surv., No. 318, 
1907, pp. 46, 47. 
From a quartz vein at Boldwell 
Company's quarry, Cooks Mountain, 
Redbeach, Calais, Me. In _ fine 
seales when compacted resembles 
serpentine. Luster pearly. Color 
ereenish - yellow. Hardness, 2.5. 
Density, 2.79. Composition: SiO., 
53.28; AlsOs, 23.06; FesOs, 0.10; 
FeO, 4.30; MgO, 4.09; 
K.O, 8.90; H.0, 6.00. 
Na.O, 0.65 ; 
(See also under Edwin E. 
Howell and George I’. Merrill.) 
PALEONTOLOGY. 
ANDERSON, Roperr. (See under Ralph 
Arnold.) 
ARNOLD, RaLpu. Geology and oil re- 
sources of the Summerland district, 
Santa Barbara County, Cal. 
Bull. U. S. Geol. Surv., No. 
¢ 1907. pp. 1-93, 
figs. 1-35. 
321, 
pls. I-XVII, 
The characteristic fossils of the 
district are here illustrated to aid 
in the identification of the oil 
horizons.. A plate by Dr. R. 8. 
3assler, illustrating the bryozoa of 
the Fernando formation is included. 
The specimens illustrated are the 
property of the National Museum. 
of fossil mollusks from the oil- 
bearing Tertiary formetions of Santa 
Barbara County. Cal. 
Smithscnian Mise. Colls.,  b, 
Quar. issue, Pt. 4, No. 1781, 
Dee. 18. 1907, pp. 419-447, 
pls. L-LV111. 
Deseribes and figures the charac- 
teristic fossil mollusks from these 
formations. The are ali 
new, and the types with one excep- 
tion are the property of the Na- 
tional Museum. 
species 
ROBERT. 
the Santa 
Barbara 
— and ANDERSON. 
ogy and 
Maria oil 
County, Cal. 
Bull. U. S 
1907, pp. 
Illustrates the 
resources of 
Santa 
oil 
district, 
Geol. Surv., No. 322, 
1-161, pls. 1-Xxv!. 
characteristic fos- 
sils to aid in the determination of 
the horizon. The specimens’ illus- 
trated are the property of the Na- 
tional Museum. 
— New and characteristic species 
Geol- | 
ARNOLD, RALPH. (See also under 
George Homans Eldridge. ) 
BASSLER, Ray S. (See under E,. O. 
etch) 
ELDRIDGE, GEORGE HOMANS, and ARNOLD, 
RatPpH. The Santa Clara Valley, 
Puente Hills, and Los Angeles oil 
districts, Southern California. 
Bull. U. S. Geol. Surv., No. 309, 
1907, pp. 1-266, pls. I-xtl, 
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 
HEquidae of North America, 
Bull. Amer. Mus. Nat. Hist., 
XXIfI, art. 85, Nov. 26, 1907; 
pp. 865-954. 
A revision of the genera and 
species, and «a rearrangement and 
reidentification of the subfamilies, 
or groups, of the Hquidae have here 
been made, and several new species 
are described. 
Wes 
Alaska in 
of Pleistocene 
Smithsonian 
1907 in 
verte- 
GILMORE, CHARLES 
explorations in 
search fossil 
brates. 
Smithsonian Misc. Colls., ut, No. 
1807, May 27, 1908, pp. 3-38, 
pls. I—xt1l, figs. 1-4. 
Deseribes 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, 
