3G 
PENNSYLVANIA AND NEW YORK DEVONIAN. 
[BULL. 120 
The outcrop from which the above list of fossils was obtained is on e 
of the typical exposures of the zone which was referred by Prof. White 
to the Genesee shale. The upper part of this gorge of the Sawkill 
which " rapidly excavates a long narrow canyon out of the Genesee 
shale," l is one of the best localities in the zone for collecting fossils. A 
table showing the geologic range of most of the species in the above 
list has been prepared, and this shows that only one species of the 
above list, Amboccelia umbonata (Con.) Hall, has been reported from the 
Genesee shale of New York, while, with one exception, every species 
is credited to the Hamilton. 
Fauna of No. 1470 F:2, with table of geologic range. 
List of species. 
Cj 
w 
a 
c8 
ID 
C 
r^ 
<\ 
a 
a 
° 
c 
c 
c 
c 
Geologic stage. * 
m 
.* 
"3 
<o 
Ch 
ob 
o 
3 
B 
p 
a" 
A 
'u 
° 
z 
... 
.... 
O 
cS 
o 
o 
m 
u 
CD 
U 
"3 
w 
u 
P< 
3 
A 
"a 
o 
u 
Y 
o 
1 
& 
X 
X 
X 
x 
3 
1 
on 
:::: 
02 
a 
o 
03 
tfc 
S3 
o 
Ah 
X 
« 
X 
fcb 
a 
© 
O 
1 
2 
3 
4 
5 
G 
Nucula corbuliformis Hall 
Tellinopsis subemarginata (Con.) Hall 
Palteoneilo constricta (Con.) Hall 
Nuculites triqueter Con 

X 
X 
X 
X 
x 
X 
X 
.*. 
X 
X 
X 
X 
X 
X 
X 
X 
x 
XT 
7 
8 
Chonetes mucronata Hall 
Hyolitb.es aclis Hall 
— 
X 
X 
9 
10 
11 
Spirifera fimbriate (Con.) Bill 
Palaeoneilo nxuta Hall 
r 
rr 
rr 
rr 
rr 
rr 
rr 
rr 
rr 
IT 
rr 
rr 
rr 
rr 
X 
X 
X 
x 
12 
13 
.... 
14 
Leda rostellata (Con ) Hall -. 
X 
..... 
15 
1(5 
X 
X 
17 
18 
Pholadella radiata (Con . ) Hall 
19 
20 
( )rthonota ( ' l ) parvula Hall 
Athyris spiriferoides (Eaton) Hall 
Tropidoleptus earinatus (Con.) Hall 
Amboccelia umbonata (Con.) Hall 
' 
?1 
X 
X 
: "x : 
99 
?,3 
X 
X 
X 
? 
?,<1 
?5 
?6 
.... 
X 
X 
X 
... 
...... 
27 
Dalmanites (Cryphams) bootlii (Green) Hall; 
possibly the var. calliteles Green 
*>R 
29 
X 
30 
31 
Cyclonema bamiltoniae Hall ( .< ) 
Bellorophon brevilineatus Con. ( ? ) 
rr 
X 
x 
32 
.... 


" i"" 
.... 
The data tised in showing the geologic range of the species in the above list .are derived princi- 
pally from the -various works of Professors Hall, H. S. Williams, and Clarke, and the distribution is 
confined mainly to New York. The reported occurrence of certain species farther south along the 
line of the Appalachians is intentionally left out of consideration, until further investigation shall 
enable us to comparo their stratigraphic position and faunas more carefully with the New York 
series. Consequently the range of each species is based upon references concerning the reliability of 
which there is believed to be no question, or upon data that are personally known to be accurate. 
This is a principle that is frequently ignored in the preparation of large tables of distribution and 
range of species. 
iProf. White, G 6 , p. 199. 
