158 MR. D. M. S. WATSON ON 
maxilla for a long distance; it is in contact with the maxilla 
throughout its length, but is separated from the nasal just behind 
the nostril by a foramen about a centimetre long and *5 cm. wide. 
In 49385 the septomaxilla is entirely within the nostril, in 
which it forms an irregular curved plate, having a suture with the 
premaxilla and forming a rudimentary floor to the nasal cavity. 
Tts outer border is in contact with the maxilla except for a small 
foramen of irregular shape (text-figs. 1, 2). 
The jugal (J.) is a comparatively small bone which forms about 
a quarter of the orbital margin : in front 1t terminates in sutures 
with the lachrymal and maxilla, and on its inner surface with the 
transverse bone. Behind the orbit it has a suture with the 
quadratojugal, squamosal, and postorbital. 
The quadratojugal (Qu.J.) is a small bone on the side of the 
skull; its end covers the outer border of the quadrate, from which 
it is not separated by a foramen quadrati. Above it touches the 
squamosal and in front the jugal. 
Text-figure 7. 
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NN 
Pnigalion oweni. Type-skull, posterior aspect, X ¢- 
Reference-letters as before. 
The quadrate (Qu.) is a large bone whose lower border forms 
the double condyle for the lower jaw; above this it rises in the 
skull with its outer edge connected with the quadratojugal and 
squamosal. The upper end of the bone and some of its hinder 
surface is overlapped by the squamosal. . 
Passing inwards from the body of the bone is a powerful 
pterygoid ramus, which overlaps from the squamosal on to the 
front face of the paroccipital process. Much of the rest of the 
posterior face of this ramus is overlapped by the pterygoid. 
Some distance above the condyle, where the pterygoid ramus joins 
