1877. 573 foe. 
PALEONTOLOGICAL BULLETIN No. 24. 
A continuation of Researches among the Batrachia of the Coal Measures 
of Ohio. © a - 
By E. D. Cops. 
‘ 
(Read before the American Philosophical Society, February 3, 1877.) 
The material described in the following pages was obtained from the 
coal strata at Linton, Ohio, during the Summer of 1876, by Prof. J. 8. 
Newberry, Director of the Geological Survey of Ohio. 
ICHTHYCANTHUS OHIENSIS. Cope. Gen. et sp. nov. 
Char. Gen. These are derived from the posterior dorsal and caudal 
vertebre, with adjacent parts. Posterior limbs well developed, with dis- 
tinct tibia and fibula, osseous tarsus, and probably five digits. Ribs elon- 
gate, simple, curved. Abdominal armature consisting of bristle-like rods 
in anteriorly directed chevrons. Dorsal vertebre not elongate, with sim- 
ple neural spines. Tail large, its vertebre ossified, and furnished with 
slender chevron bones which terminate in a hemal spine. Neural spines 
slender and directed backwards; the caudal series somewhat resembling 
that of a fish. All the centra amphiceelian. 
This genus differs from all those with enlarged and sculptured neural 
spines, and from those with abdominal scuta. It is equally distinct from 
those without ribs, abdominal rods, or limbs. It is possible that some of 
the species referred to Tuditanus, in which these parts are unknown, may. 
belong to it, or that it may be established on a small species of Leptophrac- 
PROC. AMER. PHILOS. 800. XVI. 99. 387 
