644 . PROF, H. G. SEELET ON THE SKULL OF 



quite so far back as the vomer-like elements, though they are rather 

 more symmetrical. These bones I regard as jpalatine(pn). They form 

 the outer wall of the minute palatal narine-like perforations already 

 referred to, and the inner wall of a larger pair of palatal vacuities 

 which are placed immediately below the external nares and are 

 bounded externally by the transverse bones. These palatine bones 

 diverge posteriorly, and run as narrow^bars along the outer borders 

 of the vomerine bones. Their termination forward, from the con- 

 dition of the palate, is not quite clear, though they appear to extend 

 forward as far as the palate is preserved, and abut against the inner 

 alveolar margin ; but this is somewhat uncertain. The bones appear 

 to widen a little in front of the palato-transverse foramina, and their 

 least length is probably 12 inches. The width of the palate at the 

 posterior termination is nearly 4| inches. The vacuities which lie 

 between the palatine and transverse bones are chiefly notched out 

 in the lattter. They are relatively narrow, rounded posteriorly, wider 

 behind than in front, and have a length of a little over 3 inches. 

 The distance of the posterior border from the occipital condyle is 

 about half the length of the skull. The width of the palate over 

 these vacuities at their thin hinder borders is something over 4 

 inches. They converge towards each other anteriorly in conformity 

 with the tapering of the skull forward. The transverse bones (t) are 

 second in size to the pterygoids, and altogether larger than the 

 palatine bones or the vomers. Owing to the condition of the skull, 

 there is the same difficulty in fixing the anterior limit of these bones 

 as there was with those last mentioned ; but I am led, from the indi- 

 cations preserved, to conclude that both terminate forward at the 

 anterior third of the specimen. If so, the transverse bones diverge 

 backward in a long Y-shape, and have a length of about 17 inches. 

 Throughout the whole of the anterior ends they rest against the 

 palatine bones, are prolonged as an outer border to the palatal 

 vacuities, and then widen inward so as again to run along the pala- 

 tines again till they terminate. They extend backward along the 

 outer diverging margin of the pterygoids, gradually contracting in 

 width and extending beyond the outer angle of the pterygoid into 

 the pterygo-malar vacuity for over an inch. The posterior part of 

 the bone has its external outline gently convex in length, and the 

 widest part of the bone is at the point where the palatine termi- 

 nates posteriorly, where it measures about 1-| inch from side to side. 

 Its surface is smooth, convex from within outward, and it is placed 

 obliquely, so that its outer border descends almost to the level of the 

 malar and maxillary bones. There appears to be a long narrow 

 vacuity between the maxillary and malar bones and the transverse ; 

 but it is impossible to say how far this might be modified in cha- 

 racter if the specimen were entirely free from matrix, since the 

 transverse bones are obviously thick, and may extend under the orbit. 

 But for the slight posterior projecting processes of the transverse 

 bones the cavity between the emarginate border of the pterygoid 

 and the malar and quadrato-jugal, in which the lateral vacuities 

 terminate, would be subovoid. Where widest the transverse mea- 

 surement of each of these spaces is upwards of 4 inches. 



