324 
PALAEONTOLOGY OF NEW-YORK. 
Rocks 
& 
Groups. 
GENERA AND SPECIES. 
Plate and figure. 
Page. 
[ Potsdam sandstone. 
| Oalciferous sandstone. 
| Chazy limestone. 
| Girdseye limestone. 
| iilack-nver limestone. 
| Trenton limestone. 
| Utica slate. 
| Hudson-river group. 
5 
Orbicula? subtruncata. Hall. . 
lxxix, 7 a, b 
290 
+ 
+ 
+ 
6 
— ? 
crassa, “ . 
lxxix, 8 a, b 
290 
7 
cselata. “ . 
lxxix, 9 a, b, c 
iv bis, 1 a, b 
290 
1 
LeDtsena nlicifera. “ . 
19 
+ 
+ 
+ 
2 
_ 
incrassata, “ . 
iv bis, 2 a, b, c 
19 
3 
_ 
fasciata, “ . 
iv bis, 3 a, b, c 
20 
4 
alternata, Conrad . 
£ xxxi, 1; xxxi a, 1 
C lxxix, 2 a - l 
xxxi a, 2 a, b 
102 
+ 
+ 
5 
camerata, “ . 
286 
106 
+ 
+ 
6 
_ 
deltoidea, “ . 
xxxi a, 3 a - e 
106 
7 
_ 
tenuistriata, Sowerby . 
xxxi a, 4 a - f 
xxxi b, 1 a, b, c 
108 
+ 
+ 
+ 
8 
_ 
alternistriata, Hall . 
109 
9 
sericea, Sowerby . 
c xxxi b, 2 a - h. 
1 lxxix, 3 a, b 
^ xxxi b, 3 a -f 
xxxi b, 4 a - f 
xxxi b, 5 a, b 
110 
+ 
+ 
10 
11 
— 
filitexta, Hall . 
planumbona, “ . 
287 
111 
112 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
12 
_ 
deflecta, Conrad . 
113 
13 
_ 
recta, “ .. 
xxxi b, 6 a, b 
113 
14 
_ 
planoconvexa, Hall . 
xxxi b, 7 a - d 
114 
15 
16 
— 
tenuilineata, Conrad . 
subtenta, “ . 
xxxi b, 8 
xxxi b, 9 a, b 
115 
115 
17 
(sn.indet.') . 
xxxi b, 10 a, b, c 
iv bis, 4 a, b 
c xxxii, 1 a - l 
| lxxix, 4 a - e 
xxxii, 2 a-/ 
xxxii, 3 a, b, c 
116 
1 
Orthis costnlis. Hall .. 
20 
+ 
2 
testudinaria, Dalman,...... 
117 
+ 
+ 
3 
subaequata, Conrad . 
288 
118 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
-f 
+ 
+ 
4 
_ 
bella-rugosa, “ . 
118 
5 
disparilis. “ . 
xxxii, 4 a, b, c 
119 
6 
_ 
perveta, “ ........ 
xxxii, 5 a, b, c 
120 
7 
equivalvis, Hall . 
xxxii, 6 a, b, c 
xxxii, 7 a, b 
120 
8 
* _ 
fissicosta, “ . 
121 
9 
_ 
tricenaria, Conrad . 
xxxii, 8 a - e 
121 
10 
plicatella, Hall . 
xxxii, 9 a - g 
xxxii, 10 a - e 
122 
11 
pectinella, Conrad . 
123 
12 
13 
— 
— var. semiovalis. Hall, 
insculpta, Hall . 
xxxii, 11 a, b, c 
xxxii, 12 a, b, c 
124 
125 
14 
dichotoma, 1 ‘ ....... 
xxxii, 13 a, b 
xxxii a, 1 a - o 
125 
15 
subquadrata, “ . 
126 
16 
occidental is, “ . 
C xxxii a, 2 a - q 
127 
17 
sinuata, “ . 
£ xxxii b, 1 a - e 
xxxii b, 2 a - s 
128 
128 
+ 
+ 
+ 
18 
subjugata, “ . 
xxxii c, 1 a - m 
129 
19 
erratic a. “ . 
lxxix, 5 a -f 
lxxix, 6* a, b, c 
xxxii d, 1 a - u 
iv bis, 5 
288 
+ 
20 
1 
1 
— centrilineata, “ . 
Delthyris biforatus, var. lynx, Eich. . 
289 
133 
21 
: :+++++: 
+ 
+ 
2 
3 
— 
acutirostra, “ . 
iv bis, 6 
iv bis, 7 a - e 
21 
21 
4 
plicifera, <c ....... 
iv bis, 8 a - d\ 
22 
5 
iv bis, 9 a - d 
23 
6 
extans, Conrad ... 
xxxiii, 1 a, b 
137 
+ 
+ 
+ 
7 
nucleus. Hall . 
xxxiii, 2 a, b, c 
xxxiii*, 1 a - h \ 
138 
138 
8 
cuspidata,f “ . 
Erroneously referred to fig. 5 on page 289. 
t A. cuspidata figured on supplementary plate xxxiii*. 
