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



attachment to a subvertebral ossification. The margin of the 

 posterior surface is broken away ; but it is evident that the 

 base was deeply concave from front to back and convex from 

 side to side. 



The anterior half of the side of the centrum is occupied by 

 two large articular facets for the rib. Into the upper facet 

 the base of tlie neural arch appears to enter ; it is vertically 

 ovate, about I5 inch deep and | inch wide ; but the articular 

 surface is broken ; it is separated from the inferior facet by an 

 interval of ^ inch. This facet is about an incli wide and 

 nearly Ij inch deep, subtriangular in form; it is margined 

 by an elevated rim, except in front, and is slightly concave. 

 These articulations are closer together than in Megalosaurus^ 

 and less elevated from the side of the centrum. 



The neural arch is strong and extends the entire width of 

 the centrum. The neurapophyses have a broad base of nearly 

 4 inches, and almost meet in the median line. They are 

 thick and enclose a neural canal about | inch higli and f inch 

 wide, wider above than below, and deeper apparently behind 

 than in front, where the base of the canal excavates the 

 centrum. The neurapophyses expand transversely and ante- 

 riorly in two zygapophyses, which are inclined a little forward. 

 The articular facets are almost flat, ovate, inclined to each 

 other at about an angle of 50°, as in Megalosaurus ; separated 

 by a median interval of about half an inch, without any notch 

 between them, being scarcely raised above the adjacent bone. 

 Each measures rather less than 2 inches from within outward 

 and about 1 inch transversely. Laterally there is a convex 

 inflation below the outer border of the zygapophysis. The 

 least transverse measurement over the concave lateral contour 

 of tlie neurapophyses at the neural canal is 2j inches, and 

 the transverse measurement over the zygapophyses exceeds 

 3^ inches. The vertical height from the base of the centrum 

 to the base of the zygapophysial facet is 5\ inches, and to 

 the summit of the facets 6^ inches. 



In general character the vertebra most resembles the 

 cervical of Megalosaurus^ but is much shorter in proportion to 

 its depth, indicating, if correctly referred, that Euskelesaurus 

 was a short-necked type, different from the long-necked 

 MassosjjondyJus, which resembles Zanclodon. This fact is the 

 more interesting since the forms of the pubic bones are so 

 similar in these two South-African genera that, had this 

 cervical vertebra been unknown, its Megalosauroid shortness 

 could not have been suspected. 



