AND KEPTILIA Or NORTH AMERICA. 



271 



Mecmirements. M. 



Length of vertebral colunin between pelvis and humerus, 0.070 



" " " in front of humerus, .0235 



" " caudal series preserved, .070 



" " humerus, about .0185 



" " ulna and radius, .012 



" '* part of fore limb in line, .0455 



" '• ilium, - V .007 



" " femur, ,020 

 Number of chevron rods in .004 ; seven. 



A single si>ecimeu of this Batracliian was obtained by Prof. Newberry, at Linton ; it is in a good state of 

 pieservation. 



SAURO PLEURA. DIGITATA, Cope, 

 Transac. Amer. Pliilos. Soc, 1803, XIV., p. 15. 



TUDITANUS, C'oije. 



Proceed. Amer. Philos. Soc, 1871, 177. 



Cranium broad flat, orbits anterior, bones more oi* less seulptiired. Teeth on 

 premaxillary and maxillary bones of nearly eqnal sizes. Three pectoral shields sculp- 

 tured externally. Form lizard like ; two pairs of limbs of medium proportions. 



This genus is established on two species of which the collection contains nearly 

 entire specimens. In these no chevron abdominal rods or scales can be discovered, 

 and it is not probable that they exist. The presence of the i)ectoral shields distinguishes 

 this genus from Dejidrerpeton, Owen, while the thoracic plates and lack of venti"al rods 

 separate it from Sauropleura. The plates may, however, be found in the latter; 

 should the rods be found in Tuditanus, which is not probable, these genera must be 

 united. I associate with the T. punctulatus, and T. hrevirostris three other species 

 known only from crania, a reference to be finally criticized when more is known of 

 them. They are all evidently allied. The largest is T. huxleyi ; the next, T. radiatus, 

 is named from ele\Tited radiating ridges of the cranial sculpture, T. mordax has a 

 strongly sculptured cranium, and large premaxillary teeth, while in T. obtusus the 

 orbits are less anterior, and the teeth small. I formerly described it as a Dendrer- 

 peton. 



TUDITANUS PUNCTULATUS, Cope, Sp. Nov. 



This ami>hibian is known from a single individual well preserved on the opposite halves of a block of slate. 

 The head, fore-limbs, and twenty-three consecutive vertebne with ribs are well defined, but of pelvis and hind limbs, 

 nothing is visible. 



The cranium is less exposed posteriorly than in the other species referred to the genus, and has a triangular 

 outline with narrowed but obtuse muzzle. If I do not mistake the outline of the left orbit, it is near the transverse 

 line which divides the head equally. The surface of a considerable portion is preserved, and is sculptured by small 

 pics placed closely, the intervals in a very few parts assuming the form of ridges. The sculpture is thus more minute 



