THE 
AMERICAN GEOLOGIST. 
Vol. XV. JANUARY, 1895. No. 1. 
[Pal^ontological notes from Buchtel College, No.g] 
ON A NEW SPECIMEN OF CLADODUS CLARKI. 
By E. W. Claypole. Akron, O. 
(Plates I and II.) 
Cladodus clarki was described in the American Geologist 
for May, 1893, by the writer, from a specimen found by Dr. 
■Clark in the Cleveland shale of Cuyahoga county, Ohio. 
The specimen, though far from perfect, yet represented one 
of the best cladodont fossils that had up to that date been 
discovered and supplied characters with sufficient detail to 
allow specific description. Several teeth were visible in the 
head, but they were displaced so that their number and ar- 
rangement were not determinable. The general outline of the 
fi.sh as far as the middle was fairly distinct, and the fins were 
so well preserved as to show almost every part of their struc- 
ture above the basal elements. 
Since that time Dr. Clark has found and disengaged from 
the matrix other specimens which enable me to redefine the 
species, confirming most of the characters previously pub- 
lished, and adding some others that were not discoverable in 
the former fossils. 
A second specimen, also from the Cleveland shale, like the 
former, shows only the fore part of the fish, rather less indeed 
than was contained in that fossil. But fortunately the den- 
tition is preserved in so remarkable a degree of perfection 
that I have no hesitation in stating that no other specimen 
yet described even approaches it in this respect. In spite of 
