INDEX. 
559 
Ctenacanthus (. cont .). 
pellen3is, 104. 
plicalu?, 104. 
pugiunculus, 104. 
pustulatus, 102. 
randalli, 104. 
rectus, 104. 
salopiensis, 98. 
seulptus, 104. 
serrulatus. 120. 
slmilis, 104. 
speciosus, 104. 
spectabilis, 104. 
sulcal us, 101. 
tenuirostris, 98. 
tenuistriatus, 98, 99. 
triangularis, 104. 
vamms, 104. 
vetustus, 104. 
w right!, 104. 
CTENOUO.NTID.fi, 250. 
Ctenodus, 250, 202. 
alatus, 2.'>5. 
august ulus, 200. 
appianatus, 20(4. 
asteriscus, 241. 
caudatus, 260. 
concavus, 252. 
corrugatus, 261. v 
cristatus, 234, 251. 
dialophus, 261. 
eiegans. 256. 
ellipticus, 256. 
flabelliformis, 242. 
1’ossatus, 261. 
gurleyauus, 261. 
heterolophus, 261. 
imbricatus, 256. 
interruptus, 254. 
keyseriingi, 240. 
lev is, 242. 
marginalia, 241. 
- miautus, 242. 
Ctenodus (cont.). 
robcrtsoDi, 262. 
serratus, Eichtcald, 
240. 
serratus, Newberry, 
261. 
tardus, 262. 
trachylepis, 262. 
tuberculatus, 251. 
vabasensis, 261. 
Dictyopyge, 4S6. 
Didymaspis, 199^ j 
grind rod i, 199. j) / &0/\ i 6 172 
Dimeracanthus, 97. 
concentricus, 
<v. 
Dinichthys 300.,^^^ 3o/ 
corrugatus, oOr. 
wagnen, 25o. 
vroerthi. 241. 
Ctenoptychius crenatus, 
21 >7. 
Ctenoptychius unilater¬ 
al is, 155. 
Cyathaspis, 170. 
aeadica, 173. 
banksi, 170. 
integer, 173. 
maeeulloughi, 172. 
schmidti, 173. 
sluri, 1/3. 
monoceros, 2 di . 
murchisoni, 255. 
nelsoni, 242. 
obliquus, 256. 
obtusus, 261. 
octodorsaii3, 261. 
ohioensis, 262. 
ovat^252. 
parvuius. 242. 
peri prion, 261. 
porrectus, 261. 
pusillus, 261. 
quadrat us, 257. 
rad at us. Eichtcald, 
2x1. 
radiatus, Newberry , 
242. 
reticulatus, 261. 
V 
curtus, 301. £ o/i 3CZ 
eitelensie, .->01. oo/ 
gouldi, 301. 
hertzen, 300, 301, 302., 
intermedius, 301. ^/\o/t'CUi r 3of. 
minor, New berry, .‘’>< ) 1 rr.r a ^5 
minor, liinmicbirq, »7 
302. 
OV/'f'CfT 
iev. 
newberryi, 301. p<. 
precursor, 302. pi/sdru/oS^S, 3 02. 
ringuebergi, 302: 
terre.:!, oU 0 , o02. £ 3eJ>% 
tuberculatus, 302. ~ 
Diphxissa, 
86 . 
latidens, 86. 
solidula, 86. 
symondsi, 173. ^Piplacanttiid.e, 22. 
Cycloptychius, 459. ~ Diplacanthus, 23. 
carbonarius, 460. crassisiraus, 24. 
concentricus, 461. s^v^^Wassispinus. 24, 26. 
Cylin dr acanthus, Af6 r - curtus 
120 . 
ornatus, 122. 
Cynopodius, 93, 154. 
crenulatus, 154. 
Cyphcmalepis, 156, 
o2. 
7 
egertoni, 156. 
Cyrtac&nthus, 93, 150. 
dentatus, 150. 
Dasylepis, 150. 
keyseriingi, 156. 
Dendrcdus. 322, 338. 
acutatus, 340. 
biporcatus, 338, 303. 
bnarti, 340. 
compressus, 338. 
favosus, 365. 
has tat us, 338. 
incurvus, 363. 
luiur:^ 
.UA^ • 
^ ■ 
influx us, 340. 
laris, 340. 
latus, 338. ‘ 
minor, 340. 
sigmoideus. 339. 
etrigatus, 339. 
tenuistriatus, 340. 
traquairi, 340. 
Dendropty chius, 3l v 
Desmacanthus, 115. 
cloacinus, 116. 
Dictyolepis, 156. 
bronni, 156. 
gibbus, 24. 
gracilis, 21. 
longispinus, 26, 531. 
per a r mat us, 26. 
striatulus, 24, 25. 
striatus, 23. 24. 551. 
Diplaspis, 170. 
aeadica, 173. 
Diplognathus, 312. 
inirabilis, 312. 
Diplopteras = Di- 
plopterus, 375. 
Diplopterus, 375. 
addnis, 375. 
agassis, 375. 
agassizi, 375. 
borealis, 375. 
carbonarius, 387, 3HS. 
dalgleisiensis, 390. 
gracilis, 375. 
macrocephalus, 375. 
377. 
macrolepidotus, 373, 
376. 
robertsoni, 380. 
Diplurus, 409. 
iongicaudatus, 409. 
Dipnoi, 234. 
Dipncites, 246. 
perneri, 246. 
Dipriacanthus, 
falcatus, 146. 
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