Tassin, W1RT. 
ARNOLD, RALPH. 
116 
REPORT OF NATIONAL MUSEUM, 1906. 
Merritt, GeorGe P. The division of | ARNoLD, Ratpa—Continued. 
applied geology in the U. 8. National 
Museum. . 
Trans. Am. Inst. Mining Engineers. Bi- 
monthly Bulletin No. 4, July, 1905, pp. 
931-937. : 
Contains remarks descriptive of the collec- 
tions, delivered at a meeting of the American 
Institute of Mining Engineers in the lecture 
hall of the Museum, May, 1905. 
— Contributions to the history of 
American geology. 
Rep. Smithsonian Inst. (U. S. Nat. Mus.), 
1904 (1906), pp. 189-738, pls. I-XxxvU, 
text figs. 1-141. 
The work traces the history and gradual 
development of geology in America from 
1785 to the organization of the present U.S. 
Geological Survey, in 1880. 
See under George P. Mer- 
rill. 
PALEONTOLOGY. 
The Tertiary and Qua- 
ternary pectens of California. 
Professional Paper U. S. Geol. Surv., No. 
47, Series C, Systematic Geology and 
Paleontology No. 76, 1906, pp. 1-264, 
pls. I-LUI. 
This paper consists of an introduction and 
parts I and II. 
Part I discusses the Tertiary and Pleisto- 
cene formations of California, and presents a 
post-Cretaceous geologic column and a corre- 
lation table. The various formations recog- 
nized are the Martinez and the Tejon in the 
Eocene; the San Lorenzo in the Oligocene; 
the Vaqueros sandstone; the Monterey shale 
and the San Pablo formation in the Miocene; 
the Purisima and the Merced in the Pliocene; 
the San Pedroin the Pleistocene. Each of 
these formations is treated thus: Type local- 
ity, definition of the formation, localities, 
Pecten fauna, and a list of fossils of whatever 
class. Part 1 closes with a tabular presenta- 
tion of the geologic range of the California 
pectens, both recent and fossil, and from 
recent time back through the Eocene, and a 
summary showing the number of species and 
varieties found in the Eocene, Oligocene, etc., 
the number restricted to each and the num- 
ber found transitional from one formation 
into its successor or successors. Part 11 con- 
tains a synopsis and descriptions of subgenera 
and species. 
The following species and varieties are de- 
seribed and figured as new: 
From the Eocene: Pecten ( Chlamys) calkini, 
landesi proavus. 
From the Oligocene: Pecten (Pecten) sanc- 
tecruzensis, P. (Chlamys) branneri, P. (Propea- 
musium) clallamensis, waylandi. 
From the Miocene: P. ( Pecten) carrizoensis, 
keepi, P. (Patinopecten) oweni, P. (Chlamys) 
hamlini, nutteri, sespeensis and var. hydei, P. 
Baae, Rurus M. 
(Lyropecten) bowersi, crassicardo Con., var. 
hamiltoni, estrellanus Con., var. cataline, and 
var. terminus, miguelensis, perrini, vaughani, 
P. (Plagioctenium) andersoni, and var. barke- 
rianus, cerrosensis Gabb, var. ? mendenhalli 
eldridgei, neahensis, P. (Pseudamusium) lom- 
picoensis, P. (Propeamusium) standfordensis, 
P. (Amusium) lompoensis. 
From the Pliocene: P. (Pecten) auburyi, 
coalingaensis, lecontei, merriami, vogdesi, P. 
(Patinopecten) healeyi, purisimaensis, turneri, 
P. (Chlamys) bartschi, bellilamellatus, lawsoni, 
washburnei, wattsi, and var. morani, P. (Lyro- 
pecten) ashleyi, P. ( Plagiocteniwm) cooperi, P. 
(Propeamusium) riversi. 
From the Pleistocene: P. (Chlamys) latiau- 
ritus Gabb, var. cerritensis, and var. delosi. 
Recent: P. (Chlamys) hastatus Sby., var. 
albidus Dall, P. (Pseudamusium) randolphi 
Dall, var. tillamookensis. 
The paper closes with a bibliography of 
literature bearing directly or indirectly upon 
the pectens of California. 
Miocene foraminifera 
from the Monterey shale of California, 
with a few species from the Tejon for- 
mation. 
Bull. U.S. Geol. Surv., No. 268, 1905, pp. 
1-78, pls. I-x1. 
Sixty-six species of foraminifera are de- 
scribed and illustrated in this bulletin. These 
descriptions are preceded by a discussion 
of the geology of the region by Prof. J. C. 
Branner. 
Basster, Ray S. Portland cement re- 
sources of Virginia. 
Bull. U.S. Geol. Surv., No. 243, 1905, pp. 
312-325. 
Describes the stratigraphy and gives analy- 
ses of the Portland cement rocks of Virginia, 
The stratigraphic and paleontologic investi- 
gations are based upon Museum material. 
Cement materials of the valley of 
Virginia. 
Bull. U.S. Geol. Surv., No. 260, 1905, pp. 
531-544. 
In this article the stratigraphy, paleon- 
tology, and economic value of the various 
cement horizons in the Paleozoie rocks of the 
valley of Virginia are described. Analyses, 
maps, and details of localities are also given. 
— A study of the James types of Or- 
dovician and Silurian Bryozoa. 
Proc. U.S. Nat. Mus., Xxx, No. 1442, April 
2, 1906, pp. 1-66, pls. I-VI. 
This paper presents (1) an introduction 
stating the necessity for a redescription of 
these types, (2) a bibliography of the James 
publications, (3) the laws of nomenclature 
applicable to the species under discussion, (4) 
a Classification of the Ordovician strata in the 
_ vicinity of Cincinnati, Ohio, and (5) the de- 
