Chapter D

“Dark Ages”: 3
da Vinci, Leonardo: 3
Davis, Darrell: 1
Decapoda. _See_ Coleoidea.
deer: 106
Del Mar College: 27
dendrites: 14
_Dendrograptus_: 86
Denver, Colorado: 19
_Derbya_: 57
Devonian—
derivation and pronunciation: 34
fossils: 41
placoderms: 87, 88
_Psilophyton_: 48
of El Paso and Van Horn regions, Llano and Marathon uplifts:
41
Diablo Mountains: 41
diatoms: 44, 46, 47
Dibranchiata. _See_ Coleoidea.
_Dictyoclostus_: 55
_Dimetrodon_: 92
_Dinobastis_: 102, 103
Dinocerata: 102
dinocerates: 102, 105
dinosaurs: 89, 90-_94_, 95, 96, 97, 98, 99, 100
armored: 90, 97, 99, 100
duck-billed: 90, 97, 99
flying: 91, 94, 95
horned: 90, 99, 100
plate-bearing: 90, 97, 99
swimming: 91, 93, 95
_Diplodocus_: 90
_Diplograptus_: 86
dire wolf: 102, 103
_diris, Canis_: 102, 103
distillation: 10
_Distorsio_: 63
division, plant: 44
Dixon, J. W., Jr.: 2, 90, 91
dolomite: 11
dolphins: 95
_domestica, Canis_: 22
DuBar, Jules: 1
_Dufrenoyia_: 77

E
Eastland County: 20
East Texas State College: 27
Echinodermata: 80-84
echinoderms: 80-84
asteroids: 82, 83
blastoids: 81
crinoids: 81, 82, 83
cystoids: 81, 82, 83
echinoids: 82, 84, 85
holothuroids: 84
sclerites: 83
Echinoidea: 82
echinoids: 26, 28, 29, 82, 84, 85
Cretaceous: 84, 85
plates: 84, 85
spines: 84, 85
Echinozoa: 82
Edentata: 100
edentates: 100, 101, 102
Edwards Plateau: 19, 36, 37, 42, 43
Egyptian desert: 3
_Elasmosaurus_: 91
elephants: 102
Eleutherozoa: 82
Ellison, Samuel P.: 1
El Paso region—
Devonian of: 41
Ordovician of: 40
Precambrian of: 40
Silurian of: 40
_Endopachys_: 53
_Enoploclytia_: 79
entelodont: 101, 106
_Eohippus._ _See_ _Hyracotherium_.
epoch, geologic: 33
era, geologic: 33-34
Erath County: 20
_Eryops_: 92
_Euomphalus_: 61
_Euphemites_: 62
Europe: 89
_Exogyra arietina_: 70
_laeviscula_: 70
_ponderosa_: 70
_texana_: 70

F
“false fossils”: 14
family, taxonomic: 22
“feather stars”: 82
ferns: 47, 48
fish: 87, 88, 89
armored: 41, 88
carbon residue: 9
scales: 10
teeth: 10
vertebrae: 10
_Fistulipora_: 55
_Flabellum_: 53
foramen, pedicle: 54, 56
Foraminifera: 47, 49
Cretaceous: 49
fusulinids: 26, 29, 49
orbitoid: 26, 28
Pennsylvanian: 49
forams: 26, 28, 29, 47, 49
formation, geologic: 34
fossil—
birds: 5, 100
burrows: 14
cataloging: 31
collecting: 17
equipment: 17
ethics: 20
how to collect: 20
where to look: 19
definition: 3
dung: 14
footprints: 14
gizzard stone: 14
identification: 21, 23-30
keys: 26-30
preservation—
altered hard parts: 10-11
carbonization: 9, 10
mineralization: 10
permineralization: 10
petrifaction: 10
replacement, calcareous, iron, siliceous: 10, 11, 13
kinds of: 7
original hard and soft parts: 7
record, missing pages in: 5
wood: 47
fossilization, requirements of: 5
fossils—
animal: 47-107
Cambrian: 40
carbonized: 10
classification of: 21-22
cleaning: 21
etching in acid: 21
frozen: 5, 7, 104
guide and/or index: 32
in amber: 7
in oil saturated soil: 7
in quicksand: 5
in tar: 5
in volcanic ash: 5
main types of: 44
natural mummies: 7
permineralized or petrified: 10
plant: 4, 10, 20, 32, 44-48
Pleistocene: 101, 102, 103, 104
Precambrian: 40
preparation of: 21
Quaternary: 43, 101, 102, 103, 104
replaced or mineralized: 10
silicified: 21
Cretaceous: 11
Permian: 11
etching: 21
Silurian: 40, 81
Tertiary: 43
Triassic: 42
uses of: 31-32
France: 106
Franklin Mountains, Cambrian of: 40
frogs: 89
_Frondicularia_: 49
fungi: 44
Fusselman limestone: 40
_Fusulina_: 49
fusulinids: 26, 29, 47, 49
_Fusus_: 63

G
Gaptank formation: 35, 41
gastroliths: 14
Gastropoda: 56, 59
gastropods: 26, 27, 29, 30, 56, 59, 60
Cretaceous: 59, 62
morphology: 60
ornamentation: 59
Pennsylvanian: 61, 62
Tertiary: 59, 63, 64
generic name: 21-22
genus: 21-22
geologic—
column: 33
history: 33
map, definition: 40
map of Texas: 38-39
time: 34
time scale: frontispiece, 33
geology of Texas: 37-43
Germany: 5, 100
_Gingko_: 47, 48
_Girtyocoelia_: 50
Glasscock County: 42
Glass Mountains: 11, 12, 35, 41, 42
glauconite: 11
_Globigerina_: 49
Glossary: 111-114
_Glycymeris_: 74
_Glyptodon_: 101, 102
glyptodont: 101, 102
goats: 106
goniatites: 75, 76
Grand Prairie: 36, 37
Graptolithina: 84, 86
graptolites: 27, 30, 40, 84, 86
of Marathon uplift: 40, 86
Graptozoa. _See_ graptolites.
_graysonana, Gryphaea_: 69
Great Flood: 3
ground sloths: 7, 101, 102
_Gryphaea graysonana_: 69
_washitaensis_: 69
Guadalupe Mountains, Peak: 35
Gulf Coast: 32
Gulf Coastal Plain of Texas: 35, 36, 37, 42, 43, 106
Gulf of Mexico: 37
Gulf series of Cretaceous: 34. _See also_ Upper Cretaceous.
_Gyrodes_: 62

H
hagfish: 87
hammer, geologist’s: 17, 18
_Hamulus_: 78
hand lens: 17, 18
hard parts, animal—calcareous, chitinous, phosphatic, siliceous
remains: 10
Hardin-Simmons University: 27
heart urchins: 82, 83
_Heliospongia_: 50
hematite: 11
_Hemiaster_: 85
Hemichordata: 84
Henderson County Junior College: 27
Herodotus: 3
_Heterostegina_: 32
_Heteralosia hystricula_: 12, 13
“het” zone: 32
Hexacoralla: 51
High Plains: 35, 36, 37, 42, 43, 89, 95, 106
hippopotamuses: 106
_Holaster_: 85
_Holectypus_: 85
Holothuroidea: 82
holothuroids: 84
sclerites: 83
_Homo sapiens_: 22
“horn corals”: 49, 51, 52
horses: 103, 104
teeth: 104
Howard County Junior College: 27
Hudspeth County: 35, 41, 42
Hueco Mountains: 41
Hughes, Jack T.: 1
hydroids: 49
Hydrozoa: 49, 84
_Hyracotherium_: 103, 104
_hystricula, Heteralosia_: 12, 13