1178 ON SOME ADDITIONAL LABYRINTHODONT FOSSILS, N. S. WALES 



correct, they will be supported by the evidence of the future, 

 since we may fairly expect that many additional specimens of 

 Labyrinthodonts will be in our hands before long. 



The Head, which is about 27 mm. in length, by about 32 mm. in 

 breadth at the base, is crushed flat, or even rather hollow, although 

 the parietal, quadrato-jugal and occipital bones, and the rim of 

 the orbit, remain in low relief. The parietal foramen, and the two 

 orbits, are distinct enough, though the left hand anterior portion 

 of the rim of the left hand orbit has been broken away, and a part 

 of the opening filled by a small fragment of bone, either extruded 

 from below, or slipped from the side. One of the nostrils, the 

 right, may, I think, be observed near the anterior margin and medial 

 line ; the other has disappeared. The left mandible lies outside 

 and clear of the jugal and maxillary bones. A portion of the 

 right maxilla is also preserved, and the anterior margin of the 

 frontal (I) is well marked, The posterior left hand angle seems as 

 if it ought to have the quadrato-jugal united with the supra- 

 temporal, and that with the postorbital and squamosal, but, 

 as even with the utmost effort I fail to determine any sutures, 

 I only make a conjecture to that effect. This part is sculptured 

 with shallow traces radiating from the angle, and there is a 

 depression or half-pit just inside the angle, as if at the angle the 

 bone had resisted a pressure which was sufficient to break down 

 the soft material to the right of it. This additional strength at 

 the very angle may have been due to the articulation of the lower 

 jaw directly below it. (1) The parietal bones are obviously 

 marked out by the foramen, from which similar traces of shallow 

 pits radiate in all directions, but mainly forwards and backwards. 

 The super-occipital ends abruptly backwards, as do the other 

 bones of the posterior margin of the head, as if their hinder 

 portions had been in a cartilaginous condition, and had so 

 missed complete preservation ; although, indeed, in the furrow 

 which thus abruptly terminates the occipital region, there are seen 



(1) Can this be referred to the « internal articular buttress' of the 

 Mandible? 



