320 Prof. H. G. Seeley on Euskelesaurus Brownii. 



process tend to the conclusion that the head was deep in 

 front of the orbit. The measurement from the alveolar 

 border to the summit of the nasal vacuity in its middle length 

 is 5^ inches. 



The sockets for the teeth are deepest and widest at the back 

 of the nasal vacuity and below the facial process, where they 

 are in the maxillary bone ; and they become shorter and 

 narrower as the jaw extends backward. The palatal contour 

 may probably be indicated by a line drawn through the bases 

 of the tooth-sockets, in which case it would be somewhat 

 concave in length, the middle region being straight and the 

 extremities descending concavely. The largest sockets are 

 more than 4 inches deep, while the hindermost can be little 

 more than 1 inch deep. Anteriorly the width of the sockets 

 is 1-^5 inch, posteriorly it is barely T 8 inch. The sockets are 

 vertical and parallel, separated by bony interspaces, which are 

 three or four tenths of an inch wide anteriorly, but narrower 

 behind. The depth of the jaw below the facial process is 

 fully 4 inches and its length behind that process is about 

 8 inches. The superior contour of this region is irregular 

 and broken. 



Two successional teeth are preserved within the alveoli, 

 so as to give some conception of the form and character of the 

 crowns, which are compressed from side to side, broad, con- 

 vex on the anterior border, straight on the hinder border, with 

 the extremity well rounded ; the anterior and posterior 

 margins are sharp and crenulate. The teeth have a very com- 

 pressed aspect, all the more remarkable from their extreme 

 width ; indications of these teeth in the maxillary bone are 

 seen in its third, fifth, and sixth alveoli in different stages of 

 development. As compared with Megalosaurus they are 

 much broader and less pointed. 



The facial process extends for 3^ inches behind the hinder 

 margin of the nasal vacuity, which appears to indent its base 

 in front. Its anterior margin inclines backward at an angle 

 of about 45°, and this surface is flattened as though for con- 

 tact with the nasal bone. The posterior margin, as preserved, 

 is somewhat irregular, but nearly vertical, and it shows a 

 vertically ovate foramen about \ inch in diameter near to the 

 border. There is nothing to indicate that it is the lachrymal 

 foramen. It is obviously situate in the position of the infra- 

 orbital foramen, which is preorbital. 



Without entering now into the general question of the 

 nomenclature of the similar bones from Stonesfield referred 

 to Megalosaurus, from the Stonesfield slate, and from the 

 Inferior Oolite of Sherborne, which may possibly, from their 



