76 SIE WILLIAM DAWSON ON 



larger and more formidable creatures than the Microsauria, but less so than the Labyrintho- 

 dontia. I have formerly regarded them as Laliyrinthodouts, and as the name Gastrolepidoti 

 fails to distinguish them from the Microsaurians, am disposed to prefer Fritsch's name, based 

 on the typical genus, despite its length and want of euphony. 



Genus Dendrerpeton, Owen. 



Teeth numerous, plicated at the base and chiefly on the inner side ; large detached teeth 

 in palate, also small vomerine teeth. Bones of skull corrugated ; body protected below with 

 thoracic plate and ovate bony scales ; above, horny and iml)rieated scales, also scaly lappets 

 or pendants. Form elongated ; fore limbs largest ; vertebrae somewhat biconcave ; neural 

 arches and bodies ossified. 



12. Dendrerpeton Acadianum, Owen. 



[J. G. S., vol. ix. Air-breathers, p. 17. Acadian Geology, p. 362. Trans. R. S., II., 1882, p. 642. Geol. Maga. 

 Apl., 1891.] 



Coal Formation, S. Joggins, îTova Scotia, col. Lyell and J. W. D., 1851. 



13. Dendrerpeton Oweni, Dawson. 

 [J. G. S., vol xviii., p. 469. Air-breathers, p. 32. Acadian Geology, p. 368. Trans. R. S., II., 1882, p. 643.] 

 Coal Formation, S. Joggins, col. J. W. D., 1860. 



The remains of the above species of Dendrerpeton were found in erect trees at the South 

 Joggins ; sometimes several individuals in one tree. 



Genus Baphetes. 



Teeth conical, hooked, striated longitudinally, and with inflected and convoluted cement ; 

 in two series ; the inner of larger size. Cranial bones much corrugated. Head broad. 

 Probably a dermal covering of corrugated bonj^ scales. 



14. Baphetes planiceps, Owen. 



[Journal Geol. Society, vols. x. and xi. Air-breathers, p. 10. Acadian Geology, pp. 328, 359.] 

 Coal Formation, Albion Mines, Pictou, col. J. W. D., 1850. 



Genus Platystegos, Dawson. 



Head broa<l and short ; orbits very large ; cranial bones deeply sculptured ; teeth 

 strongly plicated and cuxwed, with sharp edges at apices, especially the inner palatal teeth, 

 which are very large ; many minute teeth on the vomerine bones ; vertebrte ossified, bicon- 

 cave ; limb bones imperfectly ossified, short ; lower surface protected with a thoracic plate 

 and thick, densely imbricated bony scales in transverse rows ; body above with thin, rounded 

 scales, concentrically marked. 



15. Platystegos loricatum, s. n. 



Characters as above. Head about 8 centimetres long ; when flattened, 9 cm. broad 

 across parietal foramen ; stpTamosal and temporal bones projecting backward in points much 



