1074 DR. R. BROOM ON 
The jugal is a long triradiating bone. Its anterior process ~ 
forms the lower border of the orbit, and passes forward between 
the lacrymal and the maxilla. The ascending process passes up 
behind the orbit to articulate with the postorbital ; while the 
posterior process forms the lower border of the infratemporal 
_ fossa, and lies above and internal to the quadratojugal, 
The postfrontal is a small triangular bone which forms the 
upper and anterior border of the orbit, and the anterior border 
of the supratemporal fossa. It articulates with the frontal and 
parietal internally, and the postorbital externally. 
Text-figure 2. 
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A. Side view of skull of Youngina capensis. About 1} nat. size. 
B. Occiput of Youngina capensis. About 1} nat. size. 
IP., interparietal; Ju., jugal; La., lacrymal; Mx., maxilla: Pa., parietal; 
Pa.O., paroccipital; Po.F., postfrontal: Po.O., postorbital; Pr.F., prefrontal ; 
ne euereiee Q.J., quadratojugal; So., supraoccipital; Sq., squamosal ; 
The postorbital is moderately large. It forms part of the 
postorbital margin and most of the bar between the two 
temporal fosse. The posterior process is well developed and 
passes back between the squamosal and the tabular. 
The parietals are smaller than the frontals. Between them is 
a fairly large pineal foramen. The posterior process of the 
