WEEKS.] 
PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1894. 131 
Paleontology— Continued. 
Genera and species described— Continued. 
Limnopus vagus n. gen. et sp., Marsh, 394. 
Limopsis subimbricatus n. sp., Cragin, 102. 
Lingula gorbyi n. sp., Miller, 413. 
ligea (?), Whitfield, 629. 
manni, Whitfield, 629. 
parrishi n. sp , Miller, 413. 
sedaliensis n. sp., Miller, 413. 
vanhornii. Miller, 413. 
Liorhynchus lesleyi n. sp., Hall and Clarke, 
235. 
Liothyrma Oehlert, Hall and Clarke, 236. 
Litbophaga subalveata, Whitfield, 628. 
Litoeeras 
biangulatum n. sp., Hyatt, 305. 
hercules, Hyatt, 305. 
insolens (?), Hyatt, 305. 
whiteavesi, Hyatt, 305. 
Lituites, Hyatt, 305. 
Loxonema parvulinn, Whitfield, 629. 
plicatum, Whitfield, 629. 
Lucina acclinis (?), Whitfield, 628. 
crenulata, Whitfield, 628. 
livonensis ( ?) n. sp., Clarke, 78. 
trisuleata, Whitfield, 628. 
Lunulioardium (?.') lineolatum n.sp., Clarke, 
78. 
livoniae n. sp., Clarke, 78. 
Lycophoria Lahusen, Hall and Clarke, 236. 
Lyra Cumberland, Hall and Clarke, 236. 
Lyria wilcoxiana n. sp., Aldrich, 5. 
Lyrodesma conradi n. sp., Ulrich, 570. 
grande n. sp., Ulrich, 570. 
inornatum n. sp., Ulrich, 570. 
subplanum n. sp., Ulrich, 570. 
Lyroporina n. gen., Simpson, 513. 
Lyrosoma Conrad, Whitfield, 628. 
Lyrosoina sulcosa, AVhitfield, 628. 
Lyttonia Waagen, Hall and Clarke, 236. 
Macandrevia King, Hall and Clarke, 236. 
(Antiptychina Zittel), Hall and Clarke, 
236. 
( Aulacothyris Douville), Hall and Clarke, 
236. 
(Camerothyris Bittner), Hall and Clarke, 
236. 
(Epicyrta Deslongchamps), Hall and 
Clarke, 236. 
(EudesiaKing), Hall and Clarke, 236. 
(Fimbriothyris Deslongchamps), Hall 
and Clarke, 236. 
(Microthyris Deslongchamps), Hall and 
Clarke, 236. 
(Orthotoma Quenstedt), Hall and Clarke, 
236. 
(Plesiothyris Douville), Hall and Clarke, 
236. 
(Zeilleria Bayle), Hall and Clarke, 236. 
Macrepistius arenatus n. gen. et sp., Cope, 
95. 
Macrocaris n. gen., Miller, 413. 
gorbyi n. sp., Miller, 413. 
Macroheilus priscus, Whitfield, 629. 
regularis, Whitfield, 629. 
subcorpulentus, Whitfield, 629. 
Paleontology— Continued. 
Genera and species described — Continued. 
Mactra 
albirupina n. sp., Harris, 242. 
antiquan. sp., Cragin, 102. 
catilliformis Conrad, Dall, 124. 
dolabriforinis Conrad, Dall, 124. 
hemphilliin. sp., Dall, 124. 
(Mulinia?) lateralis, Whitfield, 628. 
(Schizodesma) deltimbris, Whitfield, 628. 
Magas Sowerby, Hall and Clarke, 236. 
Magasella Dall, Hall and Clarke, 236. 
Magellania Bayle, Hall and Clarke, 236. 
Magnolia van ingeni n. sp., Hollick, 280 
Manapsis n. gen., Scudder, 502. 
anomala, Scudder, 502. 
Mannia Dewalque, Hall and Clarke, 236. 
Margarita marcouana n. sp., Cragin, 102. 
(Solariella) newberryi n. sp., Cragin, 102. 
Margaritana subangulata n. sp., Cooper, 92. 
Mazzalina dalli n. sp., Harris, 242. 
Megalanteris Suess, Hall and Clarke, 236. 
Megalichthys macropomus Cope, Cope, 95. 
Megathyris D'Orbigny, Hall and Clarke, 236. 
Megerlina Deslongchamps, Hall and Clarke, 
236. 
Melocrinus 
asqualis n. sp., Miller, 413. 
lylii n. sp., Rowley, 481. 
tersus n. sp., Rowley, 481. 
Menispermites drysoniana n. sp., Hollick, 280. 
Mercenaria cancellata, Whitfield, 628. 
plena, Whitfield, G28. 
Merista Suess, Hall and Clarke, 236. 
tennesseensis n. sp., Hall and Clarke, 235. 
Meristella Hall, Hall and Clarke, 236. 
bella, Whitfield, 629. 
lsevis, Whitfield, 629. 
umbonata, Foerste, 197. 
walcotti n. sp., Hall and Clarke, 235. 
Meristina Hall, Hall and Clarke. 236. 
Mesodon diastematicus n. sp., Cope, 95. 
duiublei, Cope, 95. 
Mesohiiipus bairdii, Osborn and Wortman, 
433&. 
Mesohippus ( ?) longipes n. sp., Osborn and 
Wortman, 4336. 
Mesothyra gurleyi n. sp., Miller, 413. 
Metacoceras, Hyatt, 305. 
cavatiforme Hyatt, Miller, 413. 
Metamynodon planifrons, Osborn and Wort- 
man, 4336. 
Metaplasia Hall, Hall and Clarke, 236. 
Micrapsis u. gen., Scudder, 502. 
paludis, Scudder, 502. 
Microcyclus blairi n. sp., Miller, 413. 
Mitra hammakeri n. sp., Harris, 242. 
lintoidea n. sp., Aldrich, 6. 
Modiola inflata, Whitfield, 628. 
Modiolodon 
declivis n. sp., Ulrich, 570. 
obtusus n. sp., Ulrich, 570. 
oviformis, Ulrich, 570. 
var. amplus n. var., Ulrich, 570. 
subovalis n. sp., Ulrich, 570. 
subrectus n. sp., Ulrich, 570. 
