sn 
INDEX. 
559 
Ctenacanthus (< cont .). 
pellensis, 104. 
plicaius, 104. 
pugiunculus, 104. 
pustulatus, 102. 
randalli, 104. 
rectus, 104. 
salop iensis, 98. 
sculptus, 104. 
serrulatus, 126. 
similis, 104. 
speciosus, 104. 
spectabilis, 104. 
sulcatus, 101. 
tenuirostris, 98. 
tenuistriatus, 98, 99. 
triangularis, 104. 
varians, 104. 
vetustus, 104. 
wrighti, 104. 
Otenodontid^e, 250. 
Ctenodus, 250, 262. 
alatus, 255. 
angustulus, 260. 
applanatus, 260. 
asteriscus, 241. 
caudatus, 260. 
concavus, 252. 
corrugatus, 261. 
cristatus, 234, 251. 
dialophus, 261. 
elegans, 256. 
ellipticus, 256. 
flabelliformis, 242. 
fossatus, 261. 
gurleyauus, 261. 
heterolophus, 261. 
imbricatus, 256. 
interruptus, 254. 
keyserlingi, 240. 
levis, 242. 
marginalia, 241. 
minutus, 242. 
monoceros, 257. 
murchisoni, 255. 
nelsoni, 242. 
obliquus, 256. 
obtusus, 261. 
octodorsalis, 261. 
* ohioensis, 262. 
ovafc^ 252. 
parvuTus, 242. 
periprion, 261. 
porrectus, 261. 
pusillus, 261. 
quadratus, 257. 
radiatus, Eichwald, 
241. 
radiatus, Newberry, 
242. 
reticulatus, 261. 
Ctenodus ( cont.). 
robertsoui, 262. 
serratus, Eichwald, 
240. 
serratus, Newberry, 
261. 
tardus, 262. 
tracbylepis, 262. 
tuberculatus, 251. 
vabasensis, 261. 
wagneri, 255. 
woerthi, 241. 
Ctenoptychius crenatus, 
207. 
Ctenoptychius unilater- 
alis, 155. 
Cyathaspis, 170. 
Vtrabx-M' aoadioa 173. 
' r banksi, 170. 
integer, 173. 
macculloughi, 172. 
scbmidti, 173. 
Dictyopyge, 486. 
Didymaspis, 199^ / . 
grindrodi, 199. ^3 
Dimeracanthus, 97. 
concentricus, 97. 
Dinichthys 30O ; ^^ a 3o , 
“rtufloi 
c itus, oOl. co™ ct c/er?s/S, 3 o/. 
eifelensis, 301. ^ 
gouldi, 301. 3ot. 
hertzeri, 300, 301, 302. / 
intermedins, 301. van Ecus, 2 of. 
minor, Newberry, 301. 
minor, Iiingueherg, r.'j crf _ t . - 
302. &\rf Zfl 
newberryi, 301. p e/m e^s/s,ZOZ. 
precursor, 302. pc/sAo/oSr-s, 301. 
ringuebergi, 302. 
terrelli, 300, 302. /. ^scA &/*//& ■’ 
tuberculatus, 302. 
Dijphrissa, 86 . 
latidens, 86. 
sturi, 173. ^+rt/e4' ‘rt2> - solidula, 86. 
symondsi, 173. ^"'^^77,3^ IPLACAXTniI) - E ’ 
Cycloptychius, 459. Diplacanthus, 23. 
carbonarius, 460. crassisimus, 24. 
concentricus, 461. a^/iS^^f-assispinus, 24, 26. 
Cylindracanthus, 0 curtus. 32. 
120. “T 
ornatus, 122. 
Cynopodius, 93, 154. 
crenulatus, 154. 
Gyphomalepis. 156, 
157. 
egertoni, 156. 
Cyrt acanthus, 95,150. 
dentatus, 150. 
Dasylepis, 156. 
keyserlingi, 156. 
Dendrodus. 322, 338. 
aeutatus, 340. 
biporcatus, 338, 363. 
briarti, 340. 
compressus, 338. 
favosus, 365. 
hastatus, 338. 
incurvus, 363. 
inflexus, 340. 
lseyis, 340. ». • 
latus, 338. . 
minor, 340. 
sigmoideus, 339. 
strigatus, 339. 
tenuistriatus, 340. 
traquairi, 340. 
Dendropty chius, 348. 
Desmacanthus, 115. 
cloacinus, 116. 
Dictyolepis, 156. 
bronni, 156. 
gibbus, 24. 
gracilis, 21. 
longispinus, 26, 551. 
perarmatus, 26. 
stria tulus, 24, 25. 
striatus. 23, 24, 551. 
Diplaspis, 170. 
acadica, 173. 
Diplognathus, 312. 
mirabilis, 312. 
Diplopterax = Di- 
plopterus, 375. 
Diplopterus, 375. 
affinis, 375. 
agassis, 375. 
agassizi, 375. 
borealis, 375. 
carbonarius, 387, 383. 
dalgleisiensis, 390. 
gracilis, 375. 
macrocephalus, 
377. 
macrolepidotus, 
376. 
robertsoui, 386. 
Diplurus, 409. 
longicaudatus, 409. 
Dipnoi, 234. 
Dipnoites, 246. 
perneri, 246. 
Dipri acanthus, 98, 
148. 
falcatus, 146. 
375, 
373, 
