204 
INDEX TO NORTH AMERICAN GEOLOGY, 
[BULL. 271. 
Paleontology — Continued. 
Genera and species described — Continued. 
Pleurotomaria sp.undet., Kindle and Breger, 
1. 
Plicatula densata Conrad, Glenn, 5. 
Pliohippus Marsh, Gidley, 1. 
Protolenus, Matthew (G. F.),-3. 
Poacites sp., Hollick, 2. 
Podozamites angustifolius (Eichw.) Schimp., 
Hollick, 2. 
Pcebrotherium, Matthew (W. D.), 2. 
eximium, Matthew (W. D.), 2. 
labiatum, Matthew (W. D.), 2. 
wilsoni, Matthew (W. D.), 2. 
Peecilozonites (Bid.), Gulick, 1. 
berrnudensis Pfr., Gulick, 1. 
bermudensis var. zonatus Verrill, Gulick, 
1. 
circumfirmatus Redf., Gulick, 1. 
circumrirmatus var. discrepans Pfr., 
Gulick, 1. 
cupula n. sp., Gulick, 1. 
dalli n. sp., Gulick 1. 
nelsoni var. callosus n. var., Gulick, 1. 
reinianus Pfr., Gulick, 1. 
Polemarchus E. Hitchcock, Lull, 1. 
gigas E. Hitchcock, Lull, 1. 
Polymorpha gibba (d'Orbigny), Bagg, 3. 
Polymorphina d'Orbigny, Bagg, 3. 
compressa d'Orbigny, Bagg, 3. 
compressa var. striata n. var.. Bagg, 3. 
elegantissima Parker and Jones, Bagg, :'-. 
lactea (Walker ami Jacob) Bagg, 3. 
regina Brady, Parker.and Jones, Bagg, 3. 
Polynices (Neverita) duplicatus (Say) Mar- 
tin, 3. 
(Lunatia | homicryptus I Gabb), Martin, 3. 
i Lunatia i heros (Say i, Martin, 3. 
Polypora, Cumings. l. 
Polystomella Lamarck, Bagg, :'.. 
striatopunctata i Fichtel and Moll), Bagg, 
3. 
Porodiscus concentricus (Ehrenberg), Mar 
tin, 6. 
Portheus molossus < lope, < >sborn, 10. 
Potamotherium E. Geoffroy, Matthew and 
Gidley, 1. 
lacota n. sp., Matthew, Matthew and 
Gidley, l. 
Prasopora patera n. sp., Ulrich and Bassler,2. 
Premnophyllum trigonum Vel., Hollick, 2. 
Prestwichia signata n. sp., Beecher, l. 
Priscodelphinus? crassangulum n.sp.,Case, I. 
gabbi < !ope, < !ase, I. 
grandae's us Leidy, < lase, I. 
lacertosus Cope, Case, I. 
ruschenbergeri Cope, Case, 4. 
uncus Cope, < !ase, 1. 
Procamelus, Matthew (W.D.),2. 
lacustris n. sp., Douglass, l. 
madisonius n. sp., Douglass, l. 
Proclydonautilus Mojsisovics, Smith (J. P.), 2. 
triadiCUS Mojsisovics, Smith I.I. P.), 2. 
Proetus sp.. Parks, 1. 
Propleura borealis n. sp., VVieland, 1. 
Prosthennops n. gen., Gidley, Matthew and 
Gidley, 1. 
Paleontology — Continued. 
itinera and species described — Continued. 
Prosthennops crassigenis n. sp.. Gidley, 
Matthew and Gidley, 1. 
Protohippus Leidy, Gidley, 1. 
Protolabis, Matthew, 2. 
montanus n. sp., Douglass, 1. 
Protomeryx, Matthew (W. D.), 2. 
hallii, Matthew (W. D.), 2. 
Protophyllocladus subintegrifolius (Lesq.) 
Berry, Berry, 1. 
Protopora n. gen., Greene, 1. 
Protorohippus venticolus, Osborn, 11. 
Protosurcula n. gen., Casey, 1. 
gabbi Con., Casey, 1. 
plenta H. & A., Casey, 1. 
tenuirostris n. sp., Casey, 1. 
Protothaca grewingkii n. sp., Dall, 1. 
?sp., Dall, 1. 
Protrachyceras Mojsisovics, Smith (J. P.), 
Prunoides n. gen., Perkins, 6. 
bursaeformis (Lx.), Perkins, 6. 
seelyi n. sp., Perkins, (>. 
Psammobia gubernatoria n. sp., Glenn, 5. 1 
Pseudauliscus spinosus (Christian), Buyer, 1 
Pseudobradypus unguifer Dawson, Matthew 
1. 
Pseudocrinites Pearce, Schuchert, 4. 
abnormalis n. sp., Schuchert, 4. 
clarki Schuchert, Schuchert, 4. 
claypolei n. sp., Schuchert, 4. 
elongatus n. sp., Schuchert, 4. 
gordoni Schuchert, Schuchert, 4. 
perdewi Schuchert, Schuchert, 4. 
stellatus Schuchert, Schuchert, 4. 
subquadratus n. sp., Schuchert, 4. 
Pseudolabis, Matthew (W. D.), 2. 
dakotensis n. gen. and sp., Matthe 
i\V. 1).), 2. 
dakotensis, Matthew (W. D.), 2. 
Pseudomonotis Beyrich, Smith (.1. P.), 2. 
subcircularis Gabb, Smith (J. P.), 2. 
Psilocochlis n. subg., Dall, 3. 
mccallie n. sp., Dall, 3. 
Pteranodon Marsh, Eaton, 1. 
longiceps Marsh, Eaton, 1. 
Pterinea sp. undet., Kindle and Breger, 1. 
Pterospermites alaskana n. sp., Knowlton, . 
magnifolia n. sp., Knowlton, 1. 
Ptilograptus Hall, Etuedemann, l. 
geinitzianus Hall, Ruedemann, 1. 
plumosus Hall, Ruedemann, 1. 
tenuissimus n. sp., Ruedemann, 1. 
Ptyehocladia n. gen., Ulrich and Bassler,l 
agellus n. sp., Ulrich and Bassler, 1. 
Ptychosalpinx altilis (Conrad), Martin, 3. 
lienosa Conrad, Martin, 3. 
multirugata Conrad, Martin, 3. 
Ptychospira sexplicata (White and Wl 
Held), Greger, 1. 
Puffinus eonradi Marsh, Case, 4. 
Pyrula harrisi n. sp., Martin, 3. 
Quercus eoprinoides n. sp., Berry, 1. 
hollickii Berry, Berry, 1. 
lehmanii n. sp., Hollick, 1. 
morrisoniana Lesq., Hollick, 2. 
Raja ? dux Cope, Eastman, 6. 
