234 MESSRS. HANCOCK AND HOWSE 



In all there are thirty-five or thirty- six vertebrae and casts of 

 vertebras in continuous order, measuring, if placed in a right line, 

 twenty-two inches in length. Of these vertebras twenty-one ap- 

 pear to belong to the trunk, and fifteen or sixteen are caudal. 

 Now, if we deduct two or three for the lumbar vertebras, there 

 will remain seventeen or eighteen dorsal vertebras. Meyer con- 

 cluded, after carefully enumerating the joints in all the known 

 individuals, that the number is " not under sixteen, and not over 

 nineteen ;" so that it would appear that the whole of the dorsal 

 vertebras are present, in front only the cervical being deficient. 

 As Meyer estimates the tail-joints at more than thirty-six or 

 thirty-eight, it would then appear that more than half of them 

 are wanting in the specimen before us. 



The centrum of the dorsal vertebras is upwards of three-quar- 

 ters of an inch long, and about half an inch in height. In one 

 of the largest specimens figured by von Meyer (tab. IX.) it is 

 seven-eighths of an inch long and half an inch high. It would 

 therefore seem that the Midderidge example is full-grown and a 

 large individual. It is impossible to observe the ends of the ver- 

 tebras, as they are all articulated ; but from the appearance of 

 the joints where they gape a little, it would seem that both the 

 anterior and posterior articular surfaces are slightly concave, and 

 ' their margins appear as if reflected ; the sides of the centrum are 

 smooth, and are a little concave. 



The spinous process is one inch and a quarter high, being- 

 more than twice the height of the centrum, and it is half an inch 

 from back to front; consequently it is considerably shorter than 

 the body. It is much compressed, and is expanded a little above 

 in the direction of the long axis of the vertebras ; and the dorsal 

 margin or crest is slightly arched in the same direction, and ex- 

 hibits on the sides delicate longitudinal radiating strias. The 

 upper extremity of some of the anterior spinous processes are 

 strongly roughened at the sides, as if for muscular attachment. 



The anterior zygapophyses are stout and well produced ; they 

 incline outwards and upwards. The posterior pair are conside- 

 rably shorter than the anterior, and stretch backwards or out- 

 wards to overlap them. 



