OOLITIC DINOSAURS. 587 



dicated in the humerus of a small or young Cetiosaurus, figured by Phillips at p. 273, 

 Diag. CI. 



The length of the Kirtlington humerus (op. cit.), figs. 4 and 5, is 4 feet 3^ inches; 

 extreme breadth of the proximal end 1 foot 8 inches ; of the distal end 1 foot 3 inches ; 

 diameters at the middle of the shaft 8 inches by 4 inches. 



The proportion of the ulna (fig. 6) to the humerus appears to be nearly that 

 in the Monitor. The shaft is more distinctly three-sided, the anconal surface being 

 strengthened by a median longitudinal rising or ridge not present in Monitor. As in 

 this Lizard the palmar concavity excavates the whole of the upper half of that surface of 

 the shaft except at the outer and inner ridged boundaries. The margin toward the 

 radius is concave, the opposite one nearly straight, feebly convex. Both ends of the ulna 

 of the Kirtlington Cetiosaur are wanting ; it measures in this state upwards of 3 feet 

 in length. In the section, fig. 5, «, the palmar side, «, is 1 2 inches across ; the facet, h, of 

 the anconal side is 1 1 inches ; the narrower facet of the same side, c, is 7 inches. No 

 recognisable bones of the fore foot of the Cetiosaurus lovyus appear as yet to have been 

 discovered ; but the proportions of the known parts of the fore limbs are such as to make 

 it more likely that they took their share in a quadrupedal mode of progression than 

 that they were borne aloft, with the trunk, on the hind legs like the folded wings of a 

 bird. 



The first almost entire femur of Cetiosaurus longus was ol^tained mainly through the 

 j)ersonal care and supervision of Hugh E. Strickland, M.A, then (1848) of Merton 

 College, from one of the divisions or thin bands of the ' Great Oolite ^ underlyincf the 

 Cornbrash near Enslow Bridge, north of Oxford. The length of this femur is 4 feet 

 3 inches. 



In 1868 the femur of a larger individual of Cetiosaurus, and in 1870 the other bones 

 of the same individual, here described and referred to the species Cetiosaurus longus, 

 were discovered in the same quarries, close to the railway-station for Kirtlington, eight 

 miles north of Oxford. Professor Phillips having notice of the first discovery took the 

 requisite steps, with his wonted energy, to prosecute the quest and secure for his science 

 the evidences of the monster dragon. 



The thigh-bone, first come upon, " was found to be lying on a freshly bared surface 

 of the Great Oolite, nearly in the line of a natural fissure, and covered by the laminated 

 clay and thin oolitic bands which there occupy the place assigned to the Bradford Clay 

 of Wiltshire." * 



This bone was 5 feet 4 inches in length. In the course of the quarrying works 

 the opposite femur and many other bones of the same skeleton were brought to h^ht. 

 The majority of these " did not actually touch the Oolite, still less were embedded 

 in it, though single exceptions occurred of each circumstance," 



* 'Geology of Oxford,' p. 2-17-8. 



