42 
INDEX. 
PAGE. 
Page. 
Gyroccraslaciniosum.llwW, .... 
.16 
Orlhoceras sceptrum, Hall, . 
36 
G. 
Nereus, Hall, .... 
36 
0. 
sceptrum. Hall, 
26 
G. 
Nereus, Hall, ..... 
■ 86 
Ortonia, Nicholson, .... 
9, 
22 
G. ? 
Stebos, Hall, .... 
36 
0. 
conica, Nicholson, 
12, 17, 23, 
24 
G. 
Stehos, Hall,. 
36 
0. 
intermedia, Nicholson, 
9 
IIvoi.iTiins. EicUwald, .... 
■ 6, 
9 
0. 
minor, Nicholson, 
12, 17, 23, 
'24 
H. 
centennialis, ISarrett, 
6 ' 
rilAUETUELEA, Hall, .... 
7 
11. 
ceiileiinialis, (Barrett) Hall, 
6 
1'. 
tenebrosa. Hall, 
7 
11. 
lieros. Hall . 
7 
Platyostoma Niagarensc, 
14 
Naut 
i.us, Breynms, .... 
■XI, 
38 
Po 
rcellia, ..... 
37 
N. 
bucinuni, ..... 
Sei pula, ...... 
24 
N. 
Hyatti, Hall, .... 
37 
■SiMKORRis, Lamarck, 
17 
N. 
Hyatti, Hall, ..... 
37 
Spirorhis, Hall, 
9 
N. 
liratus, .... 
38 
Spirorhis, Miller and Dyer, 
9 
N. 
oriciis, Hall, ..... 
37 
S. 
Cincinatensis, Miller and Dyei’, 
12, 
17 
N. 
oriens. Hall, .... 
37 
Stropliomena alternata. 
23 
N. 
parallelus. Hall, .... 
38 
Stylioe.i, Lesueur, .... 
7, 
9 
N. 
2 }arallelus, Hall, .... 
38 
S. 
lissurella, Hall, 
7 
N. 
(OisoUes) Ammonis, . 
38 
S. 
S])ica, Hall, .... 
7 
N. 
(D. ) Ammonis, IhxU, 
38 
Te.mnociieilus, Meek, 
38 
N. 
(I). ) Marcellensis, (Vanuxem) Hall, . 
39 
Ten'tacui.itks, Schlotheim, . 
5, 8, 9, 
27 
iV. 
[H. 1 Marcellensis, (Vanu.vem) Hall, 
89 
Tentaculites?,//(dl. 
8 
Okthoceras, Breynius, .... 
12, 
2.5 
T. 
acula. Hall, .... 
6 
0 
oa'lamen, ..... 
28 
T. 
De.xithea, Hall, 
6 
O. 
cingulum, ..... 
‘>5 
T. 
distans, Hall, .... 
19 
O. 
oonsovtale, Hall, .... 
39 
T. 
ebins'alus. Hall, 
6 
O. 
consortale. Hall, 
29 
T. 
elongatus. Hall, 
6 
0. 
crotalam, ..... 
28 
T. 
? Jlextwsus, Hall, 
13, 
18 
0. 
Dadalus, Hall, .... 
80 
T. 
gyracantbus, (Eaton) Hall, . 
5 
o. 
Oapron, Hall, .... 
28 
T. 
gyracantlius, (Eaton) Hall, 
5 
0. 
Hagon, Hall, ..... 
28 
T. 
incurvus, Shumard, . 
10, 12, 
18 
o. 
ilirectum. Hall, .... 
27 
T. 
irregularis, Castelnau, 
5 
0. 
directum. Hall, .... 
27 
T. 
irregularis. Hall, 
5 
o. 
duramen. Hall, .... 
25 
T. 
minutus. Hall, 
5 
0. 
duramen. Hall, .... 
25 
T. 
minutus, Hall, .... 
5 
o 
exiiosUum, Hall. .... 
29 
T. 
Niagarensis, Hall, . 
5 
0. 
expositum. Hall, .... 
29 
T. 
Niagarensis, Hall,, var. Cumberlandia!, Hall, . 
5 
o. 
Icarus, Hall, .... 
31 
T. 
Oswegoensis, Meek anti Worthen, . 
10, 
12 
0. 
Icarus, Hall, ..... 
3! 
T. 
regularis, Castelnau, . 
5 
o. 
Jndianonsis, Hall, 
30, 
31 
T. 
Eichmondensis.'SsliWcY, . 
10, 12, 
18 
0. 
Tndianensis, Hall, 
80 
T. 
scalariformis, Hall, . 
6 
0. 
nuntium, ..... 
28 
T. 
scalariformis, Hall, 
6 
o. 
Ohioense, ..... 
27 
T. 
Sterlingensis, Meek and Worthen, 
. 10, 12, 
17 
0. 
I’elops. ..... 
26 
T. 
tenuistriatus. Meek and Worthen, 
10, 12, 18, 
23 
o. 
rudens,'./lfdl, ..... 
38 
Trochoccias ? (Gonioceras ?) pandum, Hall, 
37 
0. 
rudens, H.all,!] .... 
28 
T. 
? (G. 1) pandum. Hall, 
37 
