348 Annals of the SontJi African Museum. 



capsule it seems to me more like a quadrato-jugal,'' and further, 

 " I should like to suggest that the quadrate must be sought some- 

 where proximally to my quadrate- jugal." Though Goodrich failed 

 to identify the quadrate, and to clearly understand the articulation, 

 he deserves full credit for having been the first to correctly identify 

 the quadrato-jugal. From the determinations on Fig. 4 it is 

 manifest that Seeley regarded the quadrato-jugal as part of the 

 quadrate, as has been my own opinion till now. 



The quadrate forms the inner portion of the articular surface. 

 It is a moderate-sized bone, which is supported by the squamosal 

 but also partly by the exoccipital, and largely by the quadrato-jugal. 

 On its inner side it gives support to the dumb-bell shaped bone 

 which I hitherto believed to be the tympanic, but which now proves 

 to be the stapes. 



The vomer is not perfectly displayed in the specimen, but its 

 structure is well known in other specimens. It articulates with the 

 premaxilla in front and forms a short backward continuation of the 

 premaxillary median ridge. It divides the posterior nares, and, 

 passing backwards, spreads out, and, with the palatine, forms a roof 

 to the posterior nares after their union. 



The palatine is a well-developed bone which forms a small 

 secondary palate, and on passing backwards forms much of the 

 lateral wall of the posterior naves. The palatal surface of the 

 anterior part is roughed, as are the palatal margins and the median 

 ridge of the premaxilla, and this rough area is regarded by Seeley as 

 a tooth. Its situation is shown in Figs. 2 and 4. As with the other 

 roughened patches, I feel perfectly satisfied that there is no tooth 

 structure present and that the structure is merely a bony irregularity 

 due to the bone having been covered by a thickened epidermal 

 development. The parts marked M in Fig. 2 by the side of the 

 palate, and evidently regarded by Seeley as maxillae, are, in my 

 opinion, also palatine, the suture shown in the figure being the 

 boundary between the palatine and the maxilla. In Fig. 4 the 

 notch between the two letters M is the suture, and the posterior 

 M ought, in my opinion, to be PI. 



I can find no trace of a transpalatine. 



The pterygoid is a long narrow bone which in front articulates- 

 with the palatine, being clasped by the inner and outer portions of 

 this latter. It forms much of the walls of the posterior narial fossa. 

 Behind the fossa the bones of the two sides firmly unite with one 

 another below the basisphenoid, with which they form a strong 

 suture. The carotid foramen pierces this back part of the bone 



