214 PAL/EONTOLOGY. 



twenty-five feet in length, then the hinder extremities of the 

 Labyrinthoclon must have been of disproportionate magnitude 

 compared with those of existing Saurians, but of approximate 

 magnitude with some of the living anourous Batrachians. 

 That such a reptile, of a size equal to that of the species 

 whose remains have just been described, existed at the period 

 of the formation of the new^ red sandstone, is indicated by 

 those singular impressions to which the term Cheirotherium 

 has been applied. 



Ldbyrinthodon (Rhomhopholis) scutulahts. — The remains to 

 which this designation is applied compose a closely and 

 irregularly aggregated group of bones imbedded in sandstone, 



and manifestly belonging 

 to the same skeleton ; they 

 consist of four vertebrae, 

 portions of ribs, a humerus, 

 Fl £- 88 - a femur, two tibiae, one end 



Bhombopholis scutulata (Trias). Qf & ^ ^ ^^ ^ 



several small osseous externally sculptured, rhomboid dermal 

 scutes (fig. 88, 3). They were discovered in the new red sand- 

 stone at Leamington in 1840.* 



The vertebrae (fig. 88, 1, a) present biconcave articular sur- 

 faces as in other Labyrinthodonts. In two of them the 

 surfaces slope in a parallel direction obliquely from the axis 

 of the vertebras, as in the dorsal vertebrae of the frog, indi- 

 cating a habitual inflexion of the spine, analogous to that in 

 the humped back of the frog. The neurapophyses are anchy- 

 losed to the vertebral body. The spinous process rises from 

 the whole length of the middle line of the neurapophysial 

 arch, and expands at 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 



* Trans. Geo!. Soc, vol. vi., pi. 46. The term Anisopus there proposed had 

 been pre-engaged by Meigen for a genus of insects. 



