312 Annals of the South African Museum. 



about twenty cervical and fifteen dorsal vertebras, some imperfect 

 pterygoids for a short distance ; in front of this again the pterygoids 

 meet in the middle line for a short distance, and then are separated 

 by a narrow anterior inter-pterygoid vacuity (a. i.v.). Possibly they 

 may be in contact with one another again at their anterior ends. 

 The outer border of the posterior ram us in front of the union 

 beneath the basis cranii runs forwards and at first slightly outwards, 

 then turning outwards almost at right angles to form the posterior 

 border of the lateral ramus. The outer end of this joins the trans- 

 palatine bone (t.) which connects the pterygoid with the maxilla. The 

 flat anterior ramus of the ptervgoid is broad r>r>cf.vir>vKr K.-.4- ~~- 



,,_L^ U iiGi in tut; imutiie line, the original suture between them being 

 only visible in their expanded posterior portion. The united bones 

 extend far forwards between the premaxillae, almost to the pits 

 occupied by the tips of the replacing teeth. Followed back to the 

 nares (i.n.}, they widen gradually and are convex from side to side ; 

 at the nares they are again narrowed and the palatal surface becomes 

 fiat. Behind the nares they widen out into a fan-like expansion, and, 

 as already mentioned, the suture between them is visible, and is 

 situated at the bottom of a median depression. In front of the 

 nares the vomers lie between the palatine plates of the premaxillge, 

 which extend back just to the anterior angle of the narial opening 

 (i.n.). Behind the nares they unite with the palatine plates of the 

 maxilla externally, internal to this with the palatines, and in the 



