246 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Paleontology— Continued. 
Genera and specie* described— Continued. 
Nordenskioldia umbilicatula (Montagu), 
Chapman, 870. 
Norella Bittner, Hall and Clarke, 2264. 
Nosotetocus n. gen., Scudder, 4889. 
debilis n. sp., Scudder, 4900. 
marcovi, Scudder, 4889, 4900. 
vespertinus n. sp., Scudder, 4900. 
Nostoceras n. gen., Hyatt, 2819. 
helicinum, Hyatt, 2819. 
stantoni, Hyatt, 2819. 
var. aberrans, Hyatt, 2819. 
prematurum, Hyatt, 2819. 
Nothocyon n. gen., Wortman and Matthew, 
6496. 
geismarianus (Cope), Wortman and Mat- 
thew, 6496. 
latidens (Cope), Wortman and Matthew, 
6496. 
lemur (Cope), Wortman and Matthew, 
6496. 
parvidens (Mivart), Wortman and Mat- 
thew, 6496. 
urostictus (Mivart), Wortman and Mat- 
thew, 6496. 
Nothopus kingii n. sp., Scudder, 4900. 
Nothosaurus, Case, 768. 
Notothyris (?) Waagen, Hall and Clarke, 
2264, 2266. 
Nucleatula Bittner, Hall and Clarke, 2264. 
Nucleocrinus greenei n. sp., Miller and Gur- 
ley, 3997a. 
venustus n. sp., Miller and Gurley, 3997a. 
Nucleospira Hall, Grabau, 2086. 
Nucleospira Hall, Hall and Clarke, 2261, 2264. 
concinna Hall, Grabau, 2086. 
indianensis n. sp., Miller, 3992. 
obesa n. sp., Rowley, 4677a. 
pisiformis Hall, Keyes, 3062. 
rotundata, Whitfield, 6099. 
Nucula Lamarck, Dall, 1272. 
Nucula Lamarck, Grabau, 2086. 
bellistriata, Conrad, var. Parvula, n. var., 
Clarke, 976. 
catherina n. sp., Cragin, 1116. 
catherina, Stanton, 5197. 
chickasaensis n. sp., Cragin, 1118. 
chipolana n. sp., Dall, 1272. 
coloradoensis n. sp., Stanton, 5191. 
coloradoensis Stanton, Herrick and John- 
son, 2465. 
concentrica, Say, 4813. 
corbuliformisHall, Grabau, 2086. 
gabbin. sp., Stanton, 5199. 
hornbyensis nom. prov., Whiteaves, 6085. 
kayseri n. sp., Clarke, 976. 
lams, Say, 4873. 
magnifica Conrad, Clark, 906. 
magnifica Con., Harris, 2313. 
manitobensis n. sp., Whiteaves, 6074. 
mediavia n. sp., Harris, 2310. 
obliqua, Say, 4813. 
ovula, Harris, 2310, 2312. 
proxima, Whitfield, 6101. 
proxima Say, Dall, 1272. 
prunicola n. sp., Dall, 1272. 
Paleontology— Continued. 
Genera and species described— Continued. 
Nucula pulchella n. sp., Beede and Rogers, 
396. 
richardsoni n. sp., Whiteaves, 6085. 
shaleri Dall, Dall, 1272. 
sinaria n. sp., Dall, 1272. 
stella, Lane, 3400. 
storrsi n. sp., Stanton, 5199. 
taphria n. sp., Dall, 1272. 
ventricosa Hall, Keyes, 3062. 
Nuculana-arata (Hall), Girty. 2037. 
bellistriata Stevens, Keyes, 3062. 
Nuculites Conrad, Grabau, 2086. 
branneri n. sp., Clarke, 976. 
ererensis, Hartt and Rathbun, Clarke, 976. 
fallax n. sp., Cooper, Lane, 3400. 
nyssa, Hall, var. Majora, n. var., Clarke, 
976. 
nyssa Hall, Grabau, 2086. 
oblongatus Hall, Grabau, 2086. 
smithi n. sp., Clarke, 976. 
subcuneatus n. sp., Clarke, 946. 
tryqueter Conrad, Grabau, 2086. 
(Cleidophorus) ferrugineum n. sp., 
Foerste, 1835. 
Numitor n. gen., Scudder, 4890. 
claviger, Scudder, 4890. 
Nyassa arguta, Whitfield, 6099. 
Nyctodactylus, Williston, 6220. 
Nyctopora Nicholson, Lambe, 3374. 
billingsi Nicholson, Lambe, 3374. 
Nyssa (?) cuneataNewb., Newberry, 4083. 
vetusta Newb., Newberry, 4083. 
Obeliscus conellus, n. sp., Whitfield, 6097. 
Obolella Billings, Hall and Clarke, 2260. 
Obolella Billings, Matthew, 3789, 3790. 
atlantica Walcott, Burr, 666. 
atlantica Walcott, Grabau, 2092. 
atlantica Wale, Matthew, 3789. 
cf. chromatica Bill., Matthew, 3790. 
crassa (Hall), Grabau, 2092. 
gamagei n. sp., Hobbs, 320. 
loperi n. sp.. Walcott, 5813. 
mickwitzi n. sp., Walcott, 5813. 
namouna n. sp., Walcott, 5813. 
nitida Ford ?, Matthew, 3761. 
pandemia n. sp., Walcott, 5813. 
rhean. sp., Walcott, 5813. 
(Linnarssonia) pretiosa Billings, Dawson, 
1452. 
sp., Burr, 666. 
(?) sp., Grabau, 2092. 
Obolus Eichwald, Hall and Clarke, 2260. 
Obolus Eichwald, Walcott, 5813. 
anceps n. sp., Walcott, 5813. 
pristinus n. sp., Matthew, 3761. 
(Botsfordia) pulchra, Matthew, 3751,3761. 
(Lingulella) argutus n. sp., Walcott, 5813. 
auga n. sp., Walcott, 5813. 
bellus n. sp., Walcott, 5813. 
bellulus n. sp., Walcott, 5813. 
desideratus n. sp,, Walcott, 5813. 
dubius n. sp., Walcott, 5813. 
ellsi n. sp., Walcott, 5813. 
euglyphus n. sp., Walcott, 5813. 
franklinensis n. sp., Walcott, 5813. 
