NEW SUBORDER AND NEW SPECIES OF PHYTOSAURUS 531 



split and the lower edge of the squamosal and the posterior edge of 

 the jugal are deeply dovetailed into the quadrato-jugal. This 

 relation is clearly shown by the distinct and perfectly preserved 

 sutures. From this peculiar relation it follows that the quadrato- 

 jugal occupies very nearly as large an area on the inner side of the 



Fig. 5. — Upper view of the skull of Phytosaurus doughtyi, Xi 



temporal arch as on the outer, though it forms but a small portion 

 of the posterior lower edge of the temporal opening. The attach- 

 ment of the quadrato-jugal to the quadrate is by a broad, flat 

 suture, interrupted by a good-sized quadrate foramen. 



The jugal extends forward in a nearly straight line, not rising 

 sharply or even bending upward to form a notch below the lateral 

 temporal opening. It is not certain, but possible, that an anterior 



