/V/7, 6/HOAe^ JLO. 



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1877. J V "tv [Cope. 



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PALEONTOLOGICAL BULLETIN No. 24. 



A continuation of Researches among the Batrachia of the Goal Measures 



of Ohio. 



By E. D. Cope. 



{Bead before the American Philosophical Society, February 8, 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. S. 

 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 

 vertebrae, 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 vertebrae not elongate, with sim- 

 ple neural spines. Tail large, its vertebrae ossified, and furnished with 

 slender chevron bones which terminate in a haemal spine. Neural spines 

 slender and directed backwards ; the caudal series somewhat resembling 

 that of a fish. All the centra amphicoelian. 



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. AMEK. PHILOS. SOC. XVI. 99. 3T 



