Prof. H. G. Seeley on Euskelesaurus Brownii. 339 



very convex on the external surface, and the convexity gives 

 the tooth the aspect of curving a little inward. Both the 

 anterior and posterior margins are beautifully marked with 

 denticles, which have almost the appearance of a chain of 

 small beads extending up each edge ; and when seen from the 

 side these denticles have their lateral borders converging to a 

 sharp V-shaped cutting-edge, and they are apparently sepa- 

 rated from each other to their bases. Therefore this crown 

 shows that in all details there is a close correspondence be- 

 tween the teeth of Megalosaurus and those of this Euskele- 

 saurian. The crown of the tooth, like its side, shows delicate 

 transverse waving of the enamel, but there is no indication of 

 any vertical waving or fluting. 



It is remarkable as a point of difference from Geratosaurus 

 that there is no certain indication of a foramen in the 

 lower jaw ; and, presuming that the articular end belongs 

 to the same specimen, it is noteworthy that the depth of the 

 jaw in front of the articulation is scarcely more than half its 

 depth in the anterior dentary region, which is the exact con- 

 verse of the condition in Geratosaurus. Presumably the 

 horizontal inward plate in connexion with the articular region 

 is not found in Ceratosaurus or in any other known Saur- 

 ischian, since it has not been previously recorded. 



Cervical Vertebra. (Fig. 7.) 



Only one vertebra was collected in sufficient preservation 

 to give an idea of the character of the neck, and this has lost 

 the neural arch behind the prezygapophyses and a portion of 



Fie. 7. 



Prezygapophysis. 



Lateral articulations for 

 the cervical rib. 



Cervical vertebra of JEtiskelesaurus Broivnii. -fa nat. size. 



the base of the hinder part of the centrum. The vertebra is 

 distinguished by its short antero-posterior measurement, 

 which is about 2 inches. From the neural canal to the base 

 of the centrum in front is 3| inches, and the transverse width 

 above the middle of the centrum is 4^ inches. The anterior 

 articular face is slightly concave, but becoming convex 

 towards the external border, and at the base there is an oblique 

 area about | inch deep, which has the aspect of having given 



