398 ^ PALEONTOLOGY OF OHIO. 



die of the length of the specimen, which is, however, incomplete at both 

 ends. The sculpture of the surface of the head posterior to the orbits, as 

 well as round their borders and for some distance in front of them, con- 

 sists of a rather coarse pitting. On the middle line, between the orbits 

 and on the muzzle, the intervals become narrower, and are confluent into 

 transverse ridges or a delicate reticulation. The surface of the mandi- 

 ble displays a coarse reticulation. 



The teeth are stoutly conic, and with delicately striate grooved 

 cementum. They are slighth^ recurved. 



This species differs from the T. radiatus and T. obtusus in the absence 

 of the arese into which the sculpture is thrown. 



Longitudinal diameter of orbit, 019 m. ; length of alveolar border 

 supporting three teeth, .013; diameter of basis of tooth, .003; eight pits 

 in, .010. 



Dedicated to Prof. T. H. Huxley, facile princeps among English system- 

 atists, and an important contributor to the knowledge of the extinct 

 Batrachia. 



TUDITANUS LONGIPES, Cope. 



Sauropleura longipes, Cope; Transactions Amer. Philos. Soc, 1874. (Separata, p. 10.) 



The structure of the cranium in this species is quite unknown, the 

 part preserved being too much injured to furnish characters. The only 

 genus with which it can be compared in the structure of the skeleton 

 remaining is Tuditanus, and it is possible that some of the characters of 

 the latter, in which the present species is deficient, may yet be observed 

 in it. The type, however, T. brevirosfris, has thoracic shields and very 

 weak limbs, so that they are well distinguished. As to crania, the only 

 one of Tuditanus which could, by reason of size, belong to T. longipes, 

 is T. mordax, the T. radiatus and T. obtusus being too large. 



The vertebrae are not elongate, and the ribs are quite well developed. 

 The neural spines of the dorsal vertebrae are vertical laminae, subquad- 

 rate in outline. The tail is elongate, being proportioned much as in 

 lizards of typical forms. Of scapular arch I can find nothing, but the 

 iliac bones are preserved. They are short, flat rods, slightly narrowing 

 towards the base, which is a transverse expansion, with the distal margin 

 presenting two faces separated by an angle. The limbs are well devel- 

 oped, the ulna and radius separate. 



The general form is slender, and the limbs, especially the anterior, are 

 elongate ; the general form is more Lacertilian than Batrachian. The 



