594 



E. B. BRANSON 



half of their length. This would give the frontals a narrow form, 

 acuminate in front, and bounded behind by a regular, .coarse, zigzag 

 transverse suture. The cranium behind this point is rugose, and 

 the surface not well preserved, and it can only be said that two peculiar 

 grooves converge to a point between the posterior extremities of the 

 frontals, like the boundaries of the supraoccipitals. When the 

 postorbital roof bone is raised up, the meeting of the two gular dermal 

 bones, as I interpret them, is seen. One of these is a plate directed 

 backward and outward, bearing minute radiating lines on its upper 

 surface. It meets a similar flat plate directed forward and outward, 

 with similar lines radiating to the circumference. 



The orbits are remarkably small, and situated probably near the 

 middle of the longitudinal measurement of the cranium. The external 

 nares are not defined, but symmetrical depressions in the position 

 they usually occupy in Salamanders are distinct. 



Pariostegus myops Cope 



The surface of the cranial bones is little sculptured; there are 

 small tuberculiform elevations on the parietal, and more numerous 

 ones on the preorbitals. The postorbitals show the strongest mark- 

 ings of elongated pits, which radiate to their circumference, leaving 

 a smooth, obtuse border. The nasals present a series of small warts 

 at a little distance on each side of their common suture and transverse 

 to it. The surface of the maxillary is marked with longitudinal 

 grooves and shallow pits. 



No suture separating maxillaries and premaxillaries can be traced 

 with certainty, though the bones of the jaw are interrupted at the 

 usual place of suture, opposite the nostril. 



Length of specimen (including mandible) . . . 18.0 lines 



Width between outer convexities postorbitals . . 17.0 



Width between inner borders orbits 1 1 . o 



Width of same without preorbitals 8.0 



Width of nasals at middle 2.5 



Width of orbit 1.5 



Length of frontal and nasal premaxillary . . . . 1 1 . o 



Length of supposed branchihyal 12.0 1 



1 Proceedings of the Academy of Natural Sciences of Philadelphia, 1868, p. 211. 



