1-ks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1904. 201 
Paleontology — Continued. 
Genera and species described — Continued. 
Monocarpellites elegans n. sp., Perkins, 6. 
gibbosus n. sp., Perkins, 6. 
hitchcockii n. sp., Perkins, 6. 
irregularis n. sp., Perkins, 6. 
medius, n. sp,, Perkins, 6. 
orbicularis n. sp., Perkins, 6. 
ovalisn. sp., Perkins, 6. 
pyramidalis h. sp., Perkins, 6. 
sulcatus n. sp., Perkins, 6. 
vermontanus n. sp., Perkins, 6. 
wbitfieldii n. sp., Perkins, 6. 
Monoclonius canadensis Lambe, Lambe, 3, 4. 
Monomorella sp., Kindle and Breger, 1. 
Monotrypella Ulrich, Ulrich and Bassler, 2. 
sequalis Ulrich, Ulrich and Bassler, 2. 
Montacuta mariana Dall, Glenn, 5. 
Monticulipora D'Orbigny, Ulrich and Bass- 
ler, 2. 
cleavelandi James, Ulrich and Bassler, 2. 
c]>idermata n. sp., Ulrich and Bassler, 2. 
Morosaurus sp., Osborn, 7. 
Murchisonia (Coelacaulis) bivittata Hall, 
Kindle and Breger, 1. 
desiderata Hall, Parks, 1. 
(Turritoma) laphami Hall, Kindle and 
Breger, 1. 
sp. undet., Kindle and Breger, 1. 
Murex (Pterorhytis) conradi Dall, Martin, 3. 
Muricidea shilohensis (Heilprin), Martin, 3. 
Myacrassa Grewingk, Dall, 1. 
producta Conrad, Glenn, 5. 
Mylacris anceps n. sp., Sellards, 1. 
diplodiscus, Sellards, 1. 
elongata, Sellards, 1. 
Myelophycus n. gen., Ulrich, 1. 
curvatum n. sp., Ulrich, 1. 
Myliobatis Cuvier, Eastman, 6. 
frangens n. sp., Eastman, 6. 
gigas, Eastman, 6. 
pachyodon, Eastman, 6. 
Mylohyus Cope, Matthew and Gidley, 1. 
Myrica cliffwoodensis n. sp., Berry, 1. 
Mytilus conradinus d'Orbigny, Glenn, 5. 
(Mytiloconcha) incurvus Conrad, Glenn, 
5. 
middendorffi Grewingk, Dall, 1. 
Nanopus caudatus Marsh, Matthew, 1. 
Nassa calvertensis n. sp., Martin, 3. 
greenboroensis n. sp., Martin, 3. 
gubernatoria n. sp., Martin, 3. 
marylandican. sp., Martin, 3. 
peralta (Conrad), Martin, 3. 
peraltoides n. sp., Martin, 3. 
trivittata Say, Martin. 3. 
trivittatoides (Whitfield), Martin, 3. 
Nautilus ?sp., Martin, 3. 
Necrolemur, Wortman, 1. 
Nelumbo kempii (Hollick), Hollick, 2. 
Nileus vigilans Meek and Worthen, Finch 
(G. E.), 1. 
Niso lineata Conrad, Martin, 3. 
Nonionina d'Orbigny, Bagg, 3. 
scapha (Fichtel and Moll), Bagg, 3. 
Notidanus primigenius Agassiz, Eastman, 6. 
Notolacerta missouriensis Butts, Matthew, 1. 
Paleontology — Continued . 
Genera and species described — Continued. 
Nucleocrinus annularis Lyon, Rowley, 
Greene, 3. 
imitator Rowley, Rowley, Greene, 3. 
lueina Hall, Rowley, Greene, 3. 
Nucleospira pisiformis Hall, Kindle and 
Breger, 1. 
Nucula (Acila) decisa Conrad, Dall, 1. 
proximaSay, Glenn, 5. 
prunicola Dall, Glenn, 5. 
sinaria Dall, Glenn, 5. 
taphria Dall, Glenn, 5. 
Nyssa Gron., Perkins, 6. 
ascoidea n. sp., Perkins, 6. 
clarkii n. sp., Perkins, 6. 
complanata Lx., Perkins, 6. 
crassicostata n. sp., Perkins, 6. 
curta n. sp., Perkins, 6. 
cylindrica n. sp., Perkins, 6. 
elongata n. sp., Perkins, (i. 
equicostata n. sp., Perkins, 6. 
excavata n. sp., Perkins, 6. 
jonesii n. sp., Perkins, 6. 
lsevigata Lx., Perkins. 6. 
lamellosa n. sp., Perkins, 6. 
lescurii C. H. Hitchcock, Perkins, 6. 
microcarpa Lx., Perkins, 6. 
multicostata n. sp., Perkins, 6. 
ovata n. sp., Perkins, 6. 
solea n. sp., Perkins, 6. 
Odontaspis cuspidata (Agassiz), Eastman, 6. 
elegans (Agassiz), Eastman, 6. 
Odontopleura ortoni Foerste, Kindle and 
Breger, 1. 
Odostomia (Pyrgulina) calvertensis n. sp., 
Martin, 3. 
conoid ea (Brocchi), Martin, 3. 
(Evalea) mariana n. sp., Martin, 3. 
(Syrnola) marylandica n. sp., Martin, 3. 
(Chrysallida) melanoides (Conrad), Mar- 
tin, 3. 
Oligoporus Meek and Worthen, Klem, 1. 
coreyi Meek and Worthen, Klem, 1. 
danae Meek and Worthen, Klem, 1. 
missouriensis Jackson, Klem, 1. 
mutatus Keyes, Klem, 1. 
nobilis Meek and Worthen, Klem, 1. 
parvus Hambach, Klem, 1. 
Oiiva harrisi n. sp.. Martin, 3. 
litterata Lamarck, Martin, 3. 
Omomys ameghini n. sp., Wortman, 1. 
pucillus Marsh, Wortman, 1. 
Onchosaurus Gervais, Eastman, 2. 
Ophioderma ? sp., Clark, 3. 
Orbignella n. gen., Ulrich and Bassler, 2. 
sublamellosa n. sp., Ulrich and Bassler, 2. 
Oriostomahuntingtoneiisis n. sp.. Kindleand 
Breger, 1. 
huntingtonensis var. alternatum n. var., 
Kindle and Breger, 1. 
? opercula, Kindle and Breger, 1. 
plana n. sp., Kindle and Breger, 1. 
sp. undet., Kindle and Breger, 1. 
Ornithichnitesgallinuloides King, Matthew, 1. 
Ornitholestes hermanni Osborn, Lambe, 2. 
Ornithomimus altus Lambe, Lambe, 2. 
