INDEX. 
A. 
Page. 
Acknowledgments to those aiding. 10 
Acteon sp., occurrence of. 58 
Actinoptychus undulatus Ehr., figure show¬ 
ing. 142 
undulatus Ehr., occurrence of. 41 
Alcatraz asphalt mine, location of. s .... 78 
view of. 78 
Alkalinity, origin of. 37 
Alluvium, occurrence and description of_ 64 
Alumina in Monterey shale, origin of. 41 
Amphissa sp., occurrence of. 58 
Amusium lompocensis Arnold, figure show¬ 
ing. 138 
lompocensis Arnold, occurrence of. 32 
Anderson, Frank M., work of. 92 
Anderson, Robert, and Arnold, Ralph, 
work of. 9,14 
Andrews, E. B., on occurrence of oil. 71 
Angulus sp., occurrence of. 58 
Anticlinal theory, explanation of.... 71-72 
Anticlines, relation of oil and.'..72-74 
Antisell, Thomas, on geology of region.. 10-11,51 
Antonio, oil near. 83 
Arachnodiscus, occurrence of. 40 
ehrenbergii var. californica, occurrence 
of. 41 
Area trilineata Conrad, figure showing. 150 
trilineata Conrad, occurrence of.47,58 
sp., occurrence of.-. 58 
Area of region. 15 
Arnold, Ralph, and Anderson, Robert, work 
of. 9,14 
Arroyo Grande, asphalt near. 118 
Arroyo Grande field, development in. 14 
geology of.:. 107-108 
oil of. 108-109 
structure of. 108 
Ash, volcanic. See Volcanic ash. 
Asphalt deposits, occurrence of. 12, 
78-79,82,84-85,88,96,98,103,105,118-119 
occurrence of, mode of. 74 
Asphaltum Creek, asphalt near. 118 
Astyris richtofeni Gabb, figure showing.... 150 
richtofeni Gabb, occurrence of. 58 
Aucella piochii Gabb, figure showing. 128 
piochii Gabb, occurrence of. 28 
B. 
Bagg, R. M., fossils found by. 39 
Balanus concavus Bronn, occurrence of.... 58 
estrellanus Conrad, occurrence of. 32 
Basalt, occurrence of.64-66 
Page. 
Bathytoma carpinteria Gabb var. fernan- 
doana Arnold, figure showing.. 148 
carpinteria Gabb var. fernandoana Ar¬ 
nold, occurrence of. 58 
tryoniana Gabb, occurrence of. 58 
Bittium arnoldi Bartsch, occurrence of.... 58 
casmaliaensis Bartsch, occurrence of... 58 
Bitumen, burning of. 48-52 
geologic position of. 109-110 
Blake, fossils near.58-60 
Blake, W. P., Monterey shale named by_ 33 
Borsonia sp., occurrence of. 59 
Boyer, C. S., fossils determined by.40-41 
Brachiopoda, plate showing. 136 
Branner, J. C., on Monterey shale. 39-40 
Brookshire-IIartnell area, description of.. 99-101 
Buckhorn Canyon, geology in. 31 
Burnt shale, description of.48-52 
occurrence of. 49,82,106 
oil in. 74-75 
origin of. 48-49 
view of. 36 
Burton Mesa, description of.'....7.22-23 
diatomaceous earth on. 38 
geology on. 62 
oil in. 84,91 
structure of.83-84 
C. 
Cadulus fusiformis Sharp and Pilsbry, 
figure showing. 144 
fusiformis Sharp and Pilsbry, occur¬ 
rence of. 58 
California Coast Co., lease of, fossils from.. 57-60 
Calliostoma sp., occurrence of. 58 
Callista subdiaphana Carpenter, occurrence 
of. 58 
Campbell, A. EL, work of. 10 
Canada Arena, oil near. 89-90 
Cancellaria craw-fordiana Dali var. fugleri 
Arnold, figure showing. 144 
crawfordiana Dali var. fugleri Arnold, 
occurrence of. 58 
sp., occurrence of. 58 
Cardium brewerii Gabb, figure showing.... 126 
brew r erii Gabb, occurrence of. 32 
meekianum Gabb, occurrence of. 58 
quadrigenarium Conrad, occurrence of.. 32 
sp., occurrence of. 58 
Casmalia, diatomaceous earth near. 38 
diatomaceous earth near, view of. 36 
monocline near, view of. 80 
unconformity near, view of. 78 
1784—Bull. 322—07-11 
155 
