192 
INDEX TO NORTH AMERICAN GEOLOGY, 
[BULL. 271. 
Paleontology — Continued . 
Genera and species described— Continued. 
Ascodictyon sparsum n. sp., Ulrich and Bass- 
ler, 1. 
stellatum Nicholson and Etheridge, jr., 
Ulrich and Bassler, 1. 
Aspideretes beecheri n. sp., Hay, 1. 
beecheri Hay, Hay, 3. 
Aspidonectes tritor, Hay, 5. 
Aspidosaurus chiton n. gen. and sp., Broili, 1. 
Astarte symmetrica Conrad, Glenn, 5. 
calvertensis n. sp., Glenn. 5. 
castrana n. sp., Glenn, 5. 
cuneiformis Conrad, Glenn, 5. 
obruta Conrad, Glenn, 5. 
parma Pall, Glenn, 5. 
perplana Conrad, Glenn, 5. 
thisphila n. sp., Glenn, 5. 
tliomasii Conrad, Glenn, 5. 
vicina Say, Glenn, 5. 
Asthenotoma Harr. et Bnrr. Casey, 1. 
eximia n. sp., Casey, 1. 
shaleri Vgn.. Casey, 1. 
strigosa n. sp., Casey, 1. 
texana Gabb, Casey, 1. 
Astrangia (Coenangia) conradi n. sp., 
Vaughan, 3. 
lineata (Conradi. Vaughan, 3. 
Astrhelia palmata (Goldfuss), Vanghan, 3. 
Astrodon. Lucas, 2. 
Atactopora Ulrich, Ulrich and Bassler, 2. 
angularis, n. sp., Ulricli and Bassler, 2. 
liirsnta ririeh, Ulrich and Bassler, 2. 
maculata Clrieh, Ulrich and Bassler, 2. 
Atrina harrisii Dall., Glenn, 5. 
piscatoria n. sp., Glenn., .">. 
Atrypa calvini Nettleroth, Kindle and Bre- 
ger, 1. 
reticularis Linnseus, Kindle and Breger, 1. 
Aulaeodiscus rogersii (Bailey), Boyer, 1. 
A\ ieulipecten McCoy, Girty, 3, I. 
Aviculipecten, Hind. 1. 
Baculites aspero-anccps n. sp.. Lasswitz, 1. 
Baena eallosa n. sp.. Hay, 3. 
cephalica n. sp., Hay. l. 
marshi n. sp., Hay, 1. 
Balsena affinis Owen, Case, 4. 
Balaenoptera sursiplana Cope, Case, i. 
Balanus concavus Bronn, Cushman, 4. 
Qcavus Bronn, Martin, 2. 
proteus Conrad, Cushman, 4. 
Baptemys wyomingensis Leidy, Hay, l. 
Barnea (Scobina) arcuata (Conrad), Glenn."). 
Baropns lentus Marsh, Matthew, 1. 
Barycrinus hoveyi Hall sp., Whitfield, 2. 
Batocrinus crassitestus n. sp., Rowley, 
Greene, 1. 
davisi Rowley, Greene, 1. 
davisi var. lanesvillensis n. var., Rowley, 
Greene, 1. 
davisi var. seulptus n. var., Rowley, 
Greene, 1. 
icosidactylusCasseday, Rowley, Greene, 1. 
irregularis Casseday, Rowley, Greene, 1. 
magnirostris, n. sp., Rowley, Greene, 1. 
spergenensis Miller, Rowley, Greene, 3. 
Batrachopus E. Hitchcock, Lull, 1. 
Paleontology — Continued. 
Genera and species described — Continued. 
Batrachopus bellus (E. Hitchcock), Lull, 1. 
deweyanus E. Hitchcock, Lull, 1. 
dispar n. sp., Lull, 1. 
gracilior (E. Hitchcock), Lull, 1. 
gracilis (E. Hitchcock), Lull, 1. 
Bellerophon pelops Hall, Parks, 1. 
Beyrichites Waagen, Smith (J. P.), 2. 
rotelliformis Meek, Smith (J. P.), 2. 
Biearpellites n. gen., Perkins, 6. 
grayana (Lx., sp.), Perkins, 6. 
knowltoni n. sp., Perkins, 6. 
minimus n. sp., Perkins, fi. 
obesus n. sp., Perkins, 6. 
rotundus n. sp., Perkins, 6. 
rugosus n. sp., Perkins, 6. 
vermontanus (Lx.), Perkins, 6. 
Biddulphia acuta (Ehrenberg), Boyer, 1. 
condecora (Ehrenberg), Boyer, 1. 
decipiens Grunow, Boyer, 1. 
interpunctata (Grunow), Boyer, 1. 
semicircularis (Brightwell), Boyer, 1 
suborbicularis Grunow, Boyer, 1. 
tessellata (Greville), Boyer, 1. 
Blastomeryx Cope, Matthew (W. D.), 1. 
gemmifer Cope, Matthew (W. D.), 1 
wellsi n. sp., Matthew (W. D.), 1. 
Bolivina d'Orbigny, Bagg, 3. 
beyrichii var. alata Seguenza, Bagg, 
Bornia depressa n. sp., Glenn, 5. 
mactroides (Conrad), Glenn, 5. 
marylandiea n. sp., Glenn, 5. 
triangula Dall, Glenn, 5. 
Bothriolepis coloradensis n. sp., Eastman 
major (Ag.), Eastman, 4. 
Botryocrinus americanus n. 
Greene, 2. 
Brachiosaurus Riggs, Riggs, 2. 
altithorax Riggs, Riggs, 2. 
Brachybrachium brevipes, n. gen. and sp 
Williston, 5. 
Brachyphyllum macrocarpum Newt)., 
lick, ■;. 
Brandonia n. gen., Perkins, 6. 
globulus n. sp., Perkins, 6, 
Brontosaurus sp., Osborn, 7. 
Bryograptus Lapworth, Ruedemann, 1, 
lapworthi n. sp., Ruedemann, 1, 
pusillus n. sp., Ruedemann, 1. 
Bucania sp. undet., Kindle and Breger, 
Buccinofusus parilis Conrad, Martin, 3. 
Buccinum? sp., Dall, l. 
Bulliopsis integra Conrad, Martin, 3. 
marylandiea Conrad, Martin, 3. 
quadrata Conrad, Martin, 3. 
Cadulus newtonensis Meyer and 
Martin, 3. 
thallus (Conrad), Martin, 3. 
Ca^nopus persistens n. sp., Osborn, 9. 
Caesalpinia ovalifolia n. sp., Hollick, 1. 
Caecum calvertense n. sp., Martin, 3. 
greensboroense n. sp., Martin, 3. 
patuxentium n. sp., Martin, 3. 
Calceocrinus alleni n. sp., Rowley, 1. 
Calliostoma aphelium Dall., Martin, 3. 
bellum (Conrad), Martin, 3. 
sp., Rowl 
Aldrk 
