NAUTILID&, 311 
Navtitus, 556 
bicarinatus, 560 
bilobatus, 556 
bistrialis, 558 
eariniferus, 557 
clitellarius, 556 
complanatus, 557 
coronatus, 557 
costato-coronatus, 558 
discus, 558 
dorsatus, 561 
globatus, 558 
hiuleus, 553 
ingens, 559 
Luidi, 559 
oxystomus, 560 
pentagonus, 559 
primevus, 324 
quadratus, 560 
spheericus, 566 
subsulcatus, 560 
sulcatus, 561 
sulcifer, 561 
trochlea, 561 
tuberculatus, 562 
tuberosus, 562 
Verneuilianus, 560 
Wrighti, 558 
NEBULIPORA, 22 
explanata, 23 
lens, 23 
papillata, 24 
Nematoneura, 51 
NEMATOPHYLLIN J&, 33 
NEMATOPHYLLUM, 97 
arachnoideum, 97 
clisioides, 98 
decipiens, 99 
minus, 99 
NEMERTITES, 128 
Olivanti, 128 
Nemopterya mandibularis, 608 
NEREITES, 128 
Cambrensis, 129 
Sedgwickii, 129 
Nerita haliotis, 290 
spirata, 544 
Nucwa, 285 
Anglica, 285 
? attenuata, 511 
cingulata, 280 
clavata, 512 
claviformis, 511 
coarctata, 284 
gibbosa, 512 
Krachtze, 397 
levata, 285 
luciniformis, 512 
[easc. 111. ] 
INDEX. 
Nvcuna 
ovalis, 285 
pullastriformis, 397 
speluncaria, 513 
tumida, 512 
Vinti, 513 
NUCULID&, 285 
Nuculites planulatus, 273 
scitula, 273 
Nuculites post striatus, 286 
Nudibrachiata, 2 
ODONTOCHILE, 160 
caudata, 160 
longicaudata, 161 
obtusicaudata, 161 
truncatocaudata, 162 
Odontopleura, 152 
O«yera, 148 
Buchii, 148 
radians, 149 
OGYGIN &, 143 
Oncuus, 577 
tenuistriatus, 577 
(Ophiura Salteri,) 60 
ORACANTHUS, 634 
Milleri, 634 
Orbicula, 190 
cincta, 407 
Morvisi, 190 
nitida, 407 
rugata, 190 
striata, 191 
ORBICULID A, 188 
ORBICULOIDEA, 189 
implicata, 189 
Ormoceras, 312 
Orthambonites parva, 221 
Orruis, 212 
Actoniz, 213 
alternata, 217 
antiquata, 241 
arcuata, 384 
avellana, 221 
biloba, 213 
bilobata, 230 
callactis, 214 
ealligramma, 214 
var. calliptycha, 215 
canalis, 216 
compressa, 242 
confinis, 215 
connivens, 447 
corrugata, 233 
crispa, 216 
cylindrica, 450 
elegantula, 216 
excavata, 457 
expansa, 217 
OrtTHIS 
filosa, 243 
flabellulum, 218 
Suniculata, 244 
gibbera, 447 
grandis, 244 
Huardrensis, 454 
Hirnantensis, 219 
hybrida, 220 
inflata, 223 
interlineata, 384 
Kellyi, 451 
lata, 239 
lunata, 220 
Michelini, 448 
orbicularis, 220 
parva, 221 
pecten, 217, 245 
persarmentosa, 384 
plicata, 222 
porcata, 223 
protensa, 224 
quinquecostata, 236 
resupinata, 449 
retrorsistria, 224 
reversa, 225 
rigida, 226 
rustica, 226 
sagittifera, 227 
- sarmentosa, 227 
Sharpei, 450 
striatula, 447 
tenuissimestriata, 239 
testudinaria, 228 
turgida, 229 
undata, 234 
Vespertilio, 230 
virgata, 214, 222 
ORTHISID A, 211 
OrtTHISINA, 231 
ascendens, 231 
Scotica, 232 
ORTHOCERAS, 312 
angulatum, 313 
annulatum, 319 
annulatum, 574 
arcuoliratum, 319 
articulatum, 319 
baculiforme, 313 
pilineatum, 319 
Breyni, 567 
Brighti, 313 
bullatum, 313 
calamiteus, 406 
? centrale, 314 
cordiforme, 568 
cornu-vaccinum, 565 
eylindraceum, 569 
dactyliophorum, 574 
4P 
