134 
INDEX TO NORTH AMERICAN GEOLOGY, 
[BULL. 203. 
Paleontology— Continued. 
Gt ii< ra and species described — < lontinued. 
Mitra potomacensis n. sp., ('lark and Martin. 
141. 
Modiolopsis Hall, Grabau, 306. 
aviculoides Hall, Ruederxiann, 660. 
orthonata (Conrad), Grabau, 306. 
primigenia (Conrad), Grabau, 306. 
cf. subalatus, Grabau, 306. 
thecoidesn. sp., Matthew, 529. 
Modiolus alabamensis Aldrich, Clark and 
Martin, 141. 
marylandieus n. sp., Clark and Martin. 
141. 
Modiornorpha affinis Hall, Kindle, 442. 
alta Hall, Kindle, 442. 
charlestownensis Nettleroth, Kindle. 4 42. 
concentrica Hall, Kindle. 442. 
myteloides Con., Kindle, 442. 
recta Hall, Kindle. 112. 
Monilopora beecheri Grabau, Greene. 320. 
Monotrypa magna Ulr.,Sardeson,671. 
Morio brevedentata (Aldrich), Clark and 
Martin, 141. 
Morosaurus, Osborn and Granger, 585. 
grandis, Riggs, 651 . 
Mucronella aspera n. sp., Ulrieh, 751. 
Murchisonia desiderata Hall, Kindle, 442. 
Myliobatis Cuvier, Case, 251. 
copeanus Clark, Case, 251 . 
magister Leidy, Case, 251. 
Mylostoma Newberry, Dean, 228. 
Nassa beaumontensis Aldr., Alderson,10. 
Natica cliftonensis Clark, Clark and Martin, 
141. 
Naticopsis dubia n.sp. < Rowley), Greene, 320. 
Levis Meek, Kindle, 442. 
sp.. Kindle, 442. 
Nautilus maximus (Conrad), Kindle, 442. 
Nematophycus Caruthers, Grabau, 306. 
crassus ( Penhallow), Grabau, 306. 
Neovulpavus washakius n. gen. et.sp., Wort- 
man, 861. 
Niso umbilicata (Lea), Clark and Martin, 141. 
Nodus.- -'a affinis id'Orbigny),Bagg, 35. 
bacillum Def ranee, Bag.t:, 35. 
communis (d'Orbigny), Bagg, 35. 
consobrina var. emaeiata (Reuss), Bagg, 
35. 
obliqua (Linne), Bagg, 35. 
sandbergeri ( Reuss), Bagg, 35. 
Nonionima affinis Reuss, Bagg, 35. 
Nucleospira barrisi (White), Rowley, 568. 
barrisi White, Weller, 804. 
concinna H; "1, Kindle, 442. 
Nucula corbuliformis Hall'.', Kindle, 442. 
hanoverensis n. sp., Kindle, 442. 
herzeri Nettleroth, Kindle, 442. 
iowensis W. and W. , Weller, 804. 
lamellata Hall, Kindle, 442. 
lirata Conrad, Kindle, 442. 
neda Hall, Kindle, 442. 
niotica Hall, Kindle, 442. 
ovula Lea, Clark and Martin, 141. 
potomacensis n. sp., Clark and Martin, 
141. 
Obolella Billings 1861, Walcott, 771. 
Paleontology— Continued. 
Genera and species described — Continued. 
Obolella c. f. chromatica Billings, Matthew, 
529. 
lindstrcemi n. sp., Walcott, 771. 
mobergi n. sp., Walcott, 771. 
(Glyptias) favosa Linnarsson, Walcott, 771. 
Obolus, Waleott. 771. 
(?) meneghini n. sp. , Waleott, 771. 
tetonensis n. sp., Waleott, 771. 
zoppi n. sp., Waleott, 771. 
(Acritis?) rugatus n. sp., Walcott, 771. 
(Lingulella) bellus Walcott, Walcott, 771. 
bicensis n. sp., Walcott, 771. 
bornemanni n. sp., Waleott, 771. 
linnarssoni n. sp., Walcott, 771. 
randomensis n. sp.. Waleott, 771. 
schucherti n. sp., Waleott, 771. 
siemiradzkii n. sp., Waleott, 771. 
winona var. convexus, Walcott, 771. 
(Lingulepis) gregwa Matthew, Walcott, 
771. 
Odontaspis elegans (Agassiz), Case, 251. 
cuspidata (Agassi/,), Case, 251. 
macrota (Agassiz), Case, 251. 
Odontopleura arkansana n. sp., Van Ingen, 
763. 
Odostomia trapaquara (Harris). Clark and 
Martin, 141. 
Olenellus (Holmia) walcottanus n. sp., Wan- 
ner, 776. 
Onychoehilus (?) nitidulus? Clarke, Wood, 855. 
Oodectes perpestoides n. gen. et sp., Wort- 
man, 862, 863. 
Orbicella Dana 1846, Vaughan, 766. 
acropora (Linnaeus), Vaughan, 766: 
cavernosa (Linnseus), Vaughan, 766. 
tenuis Duncan, Vaughan, 766. 
Orbiculoidea doria Hall, Kindle, 442. 
lodiensis (Vanuxem) ?, Kindle, 442. 
parva n. sp. (Rowley), Greene, 320. 
Oreodon robustum n. sp., Douglass, 234a. 
Orthis Dalman, Grabau, 306. 
corpulenta n. sp., Sardeson, 677. 
flabellites Foerste, Grabau, 306. 
maerior n. sp., Sardeson, 677. 
minnesotensis n. sp.. Sardeson, 677. 
petrse n. sp., Sardeson, 677. 
(?) punctostriata Hall, Grabau, 306. 
rogata n. sp. or var., Sardeson, 677. 
tersus n. sp., Sardeson, 677. 
tricenaria Conrad, Ruedemann, 660. 
Orthoceras Breyn, Grabau, 306. 
annulatum Sowerby, Grabau, 306. 
caldwellensis Miller and Gurley, Kindle, 
442. 
indianense Hall, Weller, 804. 
marcellense Vanuxem, Wood, 855. 
medullare Hall, Grabau, 306. 
multiseptum Hall, Grabau, 306. 
thoas Hall, Kindle, 442. 
sp., Kindle, 442. 
Orthostrophia Hall, Grabau, 306. 
(?) fasciata Hall, Grabau, 306. 
Orthotheca bayonet n. sp., Matthew, 529. 
pugio n. sp., Matthew, 529. 
sica n. sp., Matthew, 529 
