372 PALEONTOLOGY OF OHIO. 



Ceraterpeton lineopunctatum, Cope. 



On the eleven or twelve vertebrae preserved the centra are longer 

 than deep, but not slender; there are no sculptured spines. The ribs 

 are not long, are rather stout, and beyond the proximal curve are nearly- 

 straight to the obtuse tips. The lateral thoracic shield is rather wide, 

 and sculptured on its entire external surface. The pattern is like that 

 of the skull, and consists of delicate ridges radiating from the extero- 

 posterior angle, and bifurcating in their courses towards the circumfer- 

 ence ; the interspaces are marked with a series of punctiform impres- 

 sions. The epiotic horn is as long as three vertebrae, is more than four 

 times as long as wide at the base, and has a gentle outward curvature, so 

 that the sub-acute apex is turned slightly inwards. The supraoccipital 

 has strongly convex lateral sutures. There are in the thoracic region 

 some bones of tri-radiate form and striate surface, which probably belong 

 to the scapular arch. The humerus is a stout bone, and the ulna and 

 radius rather small and separate. Two phalanges are preserved ; their 

 whole number is unknown. A fiat bone is preserved near the scapular 

 arch, which has much the form of a lacertilian pubis, with anterior pro- 

 cess, etc. The anterior part of the cranium is lost. 



Length of thirteen vertebrae, .060 m. ; length of a rib, .016; length of 

 epiotic horn, .012; length of lateral thoracic plate, .012; width of lateral 

 thoracic plate, .009 ; length of ulna, .008. 



This horned salamander has been wanting heretofore to complete the 

 representation of the Carboniferous forms of Great Britain in the cor- 

 responding fauna of the United States. It is about the size of the Igu- 

 ana tvierculata of South America. 



Ceraterpeton lennicorne, Cope. 



Represented by the remains of a cranium and its obverse in a good 

 state of preservation. It is about as wide as long, and possesses the 

 horns characteristic of this genus. The orbits are far anterior, and are 

 well separated by a wide frontal bone. The impression of the latter is 

 divided by a median line, which doubtless represents a suture. An oval 

 plate appears above and behind each postorbital bone, and they are sep- 

 arated by a parallelogrammic area which represents either parietal 

 bones or front parietals. Behind the oval plates two rather broad, band- 

 like elements curve outwards and backwards, resembling the parieto- 

 quadrate arch of lizards, or the pterotic elements of fishes. They are 



