396 
As the fragment of the ilium was discovered in the same quarry 
as the two fragments of the cranium and the portion of the lower 
jaws Mr. Owen thinks they may have belonged to the same animal ; 
and if so, as the portions of the head correspond in size with those of 
the head of a crocodile six or seven feet in length, but the acetabu- 
lar cavity with that of a crocodile twenty-five feet in length, then 
the hinder extremities of the Labyrinthodon must have been of dis- 
proportionate magnitude compared with those of existing Saurians, 
but of approximate magnitude with some of the living anourous 
Batrachia. That such a reptile, of a size equal to that of the reptile 
whose remains haye just been described, existed at the period of the 
new red sandstone, Mr. Owen says, is abundantly manifested by the 
remains of those singular impressions to which the term Cheirothe- 
rium has been applied. Other impressions, as those of the Chezro- 
therium Hercules, correspond in size with the remains of the Laby- 
rinthodon Salamandroides, which have been discovered at Guy’s. 
Cliff. The head of a femur from the same quarry in which the 
ilium was found, is shown to correspond in size with the articular 
cavity of the acetabulum. The two toe-bones, or terminal phalanges, © 
are stated to be strictly Batrachian, presenting no trace of a nail, and 
from their size are referred to the hind-feet of the L. pachygnathus. 
Thus, observes Mr. Owen, all these osseous remains from the 
Warwick and Leamington sandstones agree in their essentially Ba- 
trachian nature, and, in this interesting conclusion, with the fossils 
of the German keuper; and he concludes this portion of the memoir 
with some observations respecting the so-called Cheirotherium foot- 
steps. He has long believed that they were the foot-prints of a Ba- 
trachian, and most probably of that family which includes the toad 
and frog, on account of the difference of size in the fore and hind ex- 
tremities ; but, in consequence of the peculiarities of the impressions, 
he has always considered that the animal must have been quite 
distinct in the form of its feet from any known Batrachian or other 
reptile. Now then, he observes, we have in the Labyrinthodon 
also a Batrachian reptile, differing as remarkably from all known Ba- 
trachia and from every other reptile in the structure of its teeth : both 
the footsteps and the fossils are, moreover, peculiar to the new red 
sandstone; and though the generic name Labyrinthodon may be 
susceptible hereafter of being expanded to the appellation of a family, 
yet, he asks, may it not be justifiable to consider the term Cheiro- 
therium as one of the synonyms of Labyrinthodon ?. 
Labyrinthodon scutulatus—The remains, to which this specific 
designation has been applied by the author, composed a closely 
and irregularly aggregated group of bones imbedded in sandstone, 
and manifestly belonging to the same skeleton ; they consist of four 
vertebre, portions of ribs, a humerus, a femur, two tibiz, one end 
of a large flat bone, and several small osseous, dermal scute. The 
mass was discovered in the new red sandstone at Leamington, and 
was transmitted to Mr. Owen by Dr. Lloyd in the summer of 1840. 
The vertebre present biconcave articular surfaces similar to those 
of the other species. In two of them, the surfaces slope in a parallel 
direction obliquely from the axis of the vertebre, as in the dorsal 
