WEEKS.] 
PETROLOGY, AND MINERALOGY FOR 1892-1900. 
237 
Paleontology— Continued. 
<;< in in and species described — Continued. 
Marginella bella Conrad, Dall, 1259. 
denticulata Conrad, Dall, 1259. 
doniingoensis n. sp., Guppy and Dall, 2214. 
elegantula n. sp., Dall, 1259. 
eulima n. sp., Dall, 1259. 
faunula n. sp., Dall, 1259. 
floridana n. sp., Dall, 1259. 
gravida n. sp., Dall, 1259. 
latissima n. sp., Guppy and Dall, 2214. 
limatula Conrad, Dall, 1259. 
limonensis n. sp., Guppy and Dall, 2214. 
pardallisDall (apicinaMenke var.?),Dall, 
1259. 
newmani n. sp., Dall, 1259. 
onchidella n. sp., Dall, 1259. 
precursor n. sp., Dal] 1259. 
semen Lea, Dall, 1259. 
solitaria n. sp., Guppy and Dall, 2214. 
styria Dall, Dall, 1259. 
tempse Dall (ballista var.?), Dall, 1259. 
virginiana Conrad, Dall, 1259. 
willcoxiana n. sp., Dall, 1259. 
(Persicula) arcuata n. sp., Guppy and 
Dall, 2214. 
(Volutella) amiantula n. sp., Dall, 1259. 
daeria n. sp., Dall, 1259. 
Marginulina ensis Reuss, Bagg, 150. 
pediformia Bornemann, Bagg, 150. 
trilobate d'Orbigny, Bagg, 150. 
Mariacrinus Hall, .lames, 2889. 
aureatus n. sp., Miller, 3992. 
granulosus n. sp., Miller, 3992. 
harrisi S. A. Miller, .lames, 2889. 
Mariopteris capitate n. sp., White, 6049. 
eremopteroides n. sp., White, 6052. 
mazoniana Lx. sp., White, 6040. 
muricata (Sehloth) Zeill, White, 6049. 
cf. nervosa (Brongn.) Zeill., White, 6050. 
occidentalis n. sp., White, 6049. 
villosa n. var., White, 6049. 
pottsvillea n. sp., White, 6052. 
pygmsea n. sp., White, 6052. 
sillimanni (Brongn. >, White, 6049. 
sphenopteroides (Lx.) Zeill., White, 6050. 
tennesseeana n. sp., White, 6052. 
(Pseudopeeopteris) decipiens Lx. sp., 
White, 6040. 
sp., White, 6050. 
n. sp.,? White, 6050. 
Marsilea?attenuata (Lx.) Hollick, Knowlton, 
3264. 
Marsupiocrinus Phill., Waehsmuth and 
Springer, 5765a. 
Marsupiocrinus Phillips, Weller, 6002. 
ehieagoensis, n. sp., Weller, 6002. 
praematurus (Hall and Whitf.), Waehs- 
muth and Springer, 5765a. 
striatus W. and Sp. (nov. spec.), Waehs- 
muth and Springer, 5765a. 
tennesseensis (Roemer), Waehsmuth and 
Springer, 5765a. 
tentaculatus (Hall), Waehsmuth and 
Springer, 5765a. 
Martesia Leach, Dall, 1272. 
dalliana n. sp., Harris, 2310. 
Paleontology— Continued. 
Genera and species descr/bal— Continued. 
Martesia elongata, Harris, 2313. 
? ovalis n. sp., Dall, 1272. 
texana n. sp., Harris, 2307. 
Martinia rostrata n. sp., Girty, 2038. 
Masteutes n. gen., Scudder, 4890. 
rupis, Scudder, 4890. 
saxifer, Scudder, 4890. 
Mastodon americanus Leidy, Cope, 1104. 
floridanus, Leidy, 3447. 
successor n. sp., Cope, 1079. 
Mastodonsaurus, Case, 767. 
Matamynodon planifrons S. & O., Osbornand 
Wortman, 4192. 
Matheria Billings, Ulrich, 5539. 
rugosa n. sp., Ulrich, 5534, 5539. 
Mathilda leana Aid., Harris, 2316. 
plexita n. sp., Guppy and Dall, 2214. 
regularis Meyer, Aldrich, 74. 
Matonidium althausii (Dunker) Ward n. 
comb., Fontaine, 1850. 
Mazzalina costata n. sp., Dall, 1259. 
dalli n. sp., Harris, 2305. 
impressa, Harris, 2310. 
inaurata var. Con., Harris, 2311. 
oweni Dall, Dall, 1259. 
plena Aid., Harris, 2315. 
var. plenus, Harris, 2316. 
Mazonia Meek and Worthen, Scudder, 4897. 
acadica, Scudder, 4897. 
sp.. Scudder, 1897. 
Medusichnites Matthew, Walcott, 5811. 
Medusida Waleott, Walcott, 5811. 
atava Pohlig, Walcott, 5811. 
bieineta Baeckel, Walcott, 5811. 
coststete Torrell (sp.), Walcott, 5811. 
deperdita Beyrich (sp.), Walcott, 5811. 
porpitina Haeekel, Walcott, 5811. 
prineeps Torrell (sp.), Walcott, 5811. 
quadrate Haeekel. Walcott, 5811. 
radiata Linnarsson (sp.), Walcott, 5811. 
steurophora Haeekel, Waleott, 5811. 
Medusites cretaceous Kner, Walcott, 5811. 
helgolandicus Brandt, Walcott, 5811. 
latilobatus Amnion, Walcott, 5811. 
lindstromii, James, 2893. 
Meekapora. Simpson, 4983. 
Meckel hi White and St. John, Hall and 
Clarke, 2260. 
st riatocostata (Cox) , Keyes, 3062. 
Meekia sella Gabb, Whiteaves, 6095a. 
Meekospira n. gen., Ulrich and Scofield, 5541. 
suhconica n. sp., Ulrich and Scofield, 5541. 
Megalanteris Suess, Hall and Clarke, 2261a, 
2264. 
ovalis Hall, Clarke, 971. 
Megalichthys, Hay, 2381. 
macropomus n. sp., Cope, 1082, 1093. 
Megalneusaurus n. gen., Knight, 3208. 
rex, Knight, 3208. 
Megalograptus, James, 2881. 
welchi, James, 2881. 
Megalomphala n. gen., Ulrich and Scofield, 
5541. 
Megalomus canadensis Hall, Whiteaves, 6080. 
Megalonyx, Case, 769. 
