194 PALAEONTOLOGY 



species found in the same formation in Warwickshire ; some 

 vertebrae, and a few fragments of bones of the limbs, have 

 served, with the indications of size and shape of the trunk of 

 the animal yielded by the series of consecutive footprints, as 

 the basis of the restoration of the Lahyrintliodon scdaman- 

 droides, at the Crystal Palace. It is to be understood, how- 

 ever, that, with the exception of the head, the form of the 

 animal is necessarily more or less conjectural. 



Lahyrintliodon scutulatus. — The remains to which this 

 specific designation has been applied compose a closely and 

 irregularly aggregated group of bones imbedded in sandstone, 

 and manifestly belonging to the same skeleton ; they consist 

 of four vertebra?, portions of ribs, a humerus, a femur, two 

 tibia?, one end of a large fiat bone, and several small osseous 

 externally sculptured dermal scutes, which show that the 

 crocodilian nature of a fossil reptile is not determinable by 

 scutes only. The mass was discovered in the new red sand- 

 stone at Leamington, and was transmitted to the writer in the 

 summer of 1840. 



The vertebra? present bi-concave 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 

 vertebrae, as in the dorsal vertebra? of the frog, indicating a 

 habitual inflexion of the spine, analogous to that in the humped 

 back of the frog. The neurapophyses are anchylosed to the 

 vertebral body. The spinous process rises from the whole 

 length of the middle line of the neurapophysial arch, and its 

 chief peculiarity is the expansion of its elongated summit into 

 a horizontally-flattened plate, sculptured irregularly on the 

 upper surface. A similar flattening of the summit of the 

 elongated spine is exhibited in the large atlas of the toad. 

 The body of the vertebra agrees with that of the L. Uptog- 

 nathus. The humerus isan inch long, regularly convex nt the 

 proximal extremity, and expanded ;it both extremities, but 



