New Coccostean — Coccodeus Cuyahogce. — Clay pole. 167 
Palaeozoic. 
Me 
SOZOIC. 
C 
ENOZOIC. 
a 
t3 O 
o 
F( 
d 
.2 
5 
o 
33 ^4^ 
.2 o 
ij 
03 
i 
.5 
c 
4) 
s 
Hi 
o 
cc 
H 
>=i 
-^ 
& 
« 
?Rhynchoi-a, Dalman. 

Subfam. Krai'ssimn.e. 
-^ 
Krausfina, Davidson. 
Megerlina, Deslongchamps. 
_ 



_ 
__ 

_ 


Nninber of genera appealing in eacli 
system. 
2-i 
47 
41 
40 
36 
24 
35 
10 
1 
7 
11 
186 
72 
21 
Genera occurring in a system. 
2d 
51 
fiS 
71 
51 
32 
45 
:52 
14 
l(i 
27 
Genera restrictetl to one svstem. 
18 
•iA 
20 
■6b 
33 
21 
21 
' 

11 
Number of genera derived from pre- i 
ceding sv.stems. \ 
4 
23 
29 
15 
r 
9 
20 
13 
11 
l(i 
Number of genera passing from one ' 
„ 
13 
period to the next above it. \ 
' 
[PAL.K()XTOT.<)(iic.\r. Notes from BrcuTKL I'ollege, No. 3.j 
A NEW COCCOSTEAN — COCCOSTEUS CUYA- 
HOG/E. 
i;y E. \V. Ci.AYroLE, Akron, O. 
Figs. 1 and 2. 
The ••Old Ked Sandstone" of Scotland furnished Hugh Miller 
with the original fossils on which the name Coccosteus was placed, 
and for which his now classic description was drawn up. He 
recognized several species but these have since been reduced to 
two by merging several into his first and chief form C. dccipinis 
which, with C. nilnor, comprises probably all that he discovered. 
Since his time, however, others have been brought to light but 
as these are not all described fi'om the same plate or part of the 
skeleton it is scarcely possible at present to correlate them. 
The structure of the genus is however fairly well understood 
so that little doubt exists concerning the position and relation 
of the various plates of the head and body. But of a few minor 
features and of the ditierence l)etvveen the species in matters of 
detail much yai remains to be learned. 
