136 
INDEX TO NORTH AMERICAN GEOLOGY, 
[BULL. 203. 
Paleontology— Continued. 
Genera and species described— Continued. 
Platygyra viridis (Le Seur), Vaughan, 766. 
Platyostoma pleurotoma Hall, Kindle, 442. 
lineata Conrad, Kindle, 442. 
lineatum var. callosum Hall, Kindle, 442. 
niagarense Hall, Rowley, Greene, 320. 
turbinata Hall, Kindle, 442. 
turbinata var. cochleata, Kindle, 442. 
sp., Kindle, 442. 
Platystrophia biforata Schlotheim sp., Rue- 
demann, 660. 
Plectambonites Pander, Grabau, 306. 
pisum n. sp., Ruedemann, 660. 
sericea (Sowerby), Grabau, 306. 
sericeus Sowerby var. asper James, Rue- 
demann, 660. 
transversalis (Wahlenberg), Grabau, 306. 
Plethospira socialis Girty ?, Kindle, 442. 
Pleuroeeras Rafmesque, Letson, 493. 
siibulare Lea, Letson, 493. 
Pleurodictyum lenticulare, Beecher, 51. 
Pleuronotus decewi (Billings), Kindle, 442. 
Pleurotoma ducateli n. sp., Clark and Martin. 
141. 
harrisi Clark, Clark and Martin, 141. 
piscatavensis n. sp., Clark and Martin, 141. 
potomacensisn.sp., Clark and Martin, 141. 
tyaoni n. sp.. Clark and Martin. 111. 
(Hemipleurotoma) childreni Lea, Clark 
and Martin, 141. 
Pleurotomaria De France, Grabau, 306. 
clivosa n. sp., Sardeson, 677. 
littorea Hall. Grabau, 306. 
lucina Hall, Kindle, 442. 
lucina var. perfasciata Hall, Kindle, 442. 
pervetusta (Conrad), Grabau, 306. 
procteri Nettleroth, Kindle, 442. 
?quinquesulcata Win., Weller, 804. 
snleomarginata Conrad, Kindle, 442. 
sp., Kindle, 442. 
?sp. undet., Weller, 804. 
Pliohippus simplicidens Cope, Gidley, 292. 
Pollicipt's siluricus n. sp., Ruedemann, 659. 
Polygyra dalli Stearns, 727. 
Polymorphinaaustriaca (d'Orbigny ),Bagg,35. 
communis (d'Orbigny), Bagg, 35. 
compressa d'Orbigny, Bagg, 35. 
elegantissima I'arker and Jones, Bagg, 35. 
gibba (d'Orbigny), Bagg, 35. 
lactea (Walker and Jacob), Bagg, 35. 
praelonga Terquem, Bagg, 35. 
Polyphemopsis louisvillae Hall and Whitf., 
Kindle, 442. 
Polypora McCoy, Grabau, :!0(i. 
incepta Hall, Grabau, 306. 
Pomatiopsis Tryon, Letson, 493. 
lapidaria (Say) Tryon, Letson, 493. 
Pontobdellopsis cometa n. gen, etsp., Ruede- 
mann, 659. 
Porites astreoides Lamarck, Vaughan, 766. 
porites (Pallas), Vaughan, 766. 
Portochelys laticeps n. gen. et sp., Williston, 
837. 
Prasopora simulatrix Ulr., Sardeson, 671. 
simulatrix var. orientalis Ulrich, Ruede- 
mann, 660. 
Paleontology— Continued. 
Genera and species described— Continued. 
Primitia mundula var. jonesi n. var., Ruede- 
mann, 660. 
Prodophoenus W T ortman and Matthew, Wort- 
man, 861. 
Prodromites n. gen., Smith and Weller, 711. 
gorbyi Miller, Smith and Weller, 711. 
praematurus n. sp., Smith and Weller, 
711. 
Productella concentrica (Hall), Weller, 804. 
Minneapolis n. sp., Sardeson, 677. 
semiglobosa Nettleroth, Kindle, 442. 
spinulicosta Hall, Kindle, 442. 
Productus arcuatus Hall, Weller, 804, 
morrillisnus Win., Weller, 804. 
parvicostatus n. sp. (Rowley), Greene, 320. 
parvulus Win., Weller, 804. 
punctatus Martin, Weller, 804. 
Proetus canaliculars Hall, Kindle, 442. 
clarus Hall, Kindle, 442. 
corrugatus n. sp., van Ingen, 763. 
crassimarginatus Hall, Kindle, 442. 
curvimarginatus Hall and Clarke, Kindle, 
442. 
folliceps Hall and Clarke, Kindle, 442. 
latimarginatus Hall and Clarke, Kindle, 
442. 
macrocephalusHall, Kindle, 442. 
microgemina Hall and Clarke , Kindle, 442. 
subannulatus n. sp., Van Ingen, 763. 
Promacrus cuneatus Hall, Weller, 804. 
Protapirus robustus n. sp., Sinclair, 703. 
Protocardia lenis Conrad, Clark and Martin, 
141. 
l'rotohippus cumminsii (Cope), Gidley, 292. 
phlegon (Hay), Gidley, 292. 
Protowarthia cancellata Hall sp., Ruede- 
mann, 660. 
Protozyga exigua Hall, Ruedemann, 660. 
Pteria limula (Conrad), Clark and Martin, 
141. 
Pterinea Goldi'uss, Grabau, 306. 
emacerata (Conrad), Grabau, 306. 
flabella (Con.) Hall, Kindle, 442. 
grandis Hall, Kindle, 442. 
Pterinopecten nodocostatus (W. and W.), 
Weller, 804. 
nodosus Hall, Kindle, 442. 
reflexus Hall, Kindle, 442. 
undosus Hall, Kindle, 442. 
Pterygometopus eboraceus Schmidt, Ruede- 
mann, 660. 
Pterygotus Agassiz, Grabau, 306. 
cobbi Hall, Grabau, 306. 
globicaudatus Pohlman, Grabau, 306. 
macropthalmus Hall, Grabau, 306. 
Ptilodictya (Escharopora) subrecta Ulr., Sar- 
deson, 672. 
Ptychodesma knappianum H. and W , Kin- 
dle, 442. 
Pseudoliva sp., Clark and Martin, 141. 
Pugnax striatocostata (M. and W.), Weller 
804. 
Pulvinulina exigua var. obtusa Burrows, 
Bagg, 35. 
schreibersii (d'Orbigny), Bagg, 35. 
