J, W. HULKE ON A NEW WEALDEN DINOSAUR, 421 
33. VECTISAURUS VALDENSIS, a new WEALDEN Dinosaur. 
By J. W. Hunky, Hsq., F.R.S., F.G.S. (Read April 30, 1879.) 
[Puate XXI.] 
On the 13th of October, 1871, [ found, weathered out, lying on the cliff- 
foot, 300 yards east of the flagstaff near Brixton Chine, Isle of Wight, 
the fossil remains now submitted to the Society. The extreme 
autumnal heat had much cracked the surface of the clay in which the 
bones had been entombed; and these also were shattered into number- 
less small fragments, most of which could not be joined, so that parts 
of six vertebra and of a large flat bone, which I regard as an ilium, 
were all that could be recovered. Since then I have several times re~ 
visited the spot in the hope of finding other portions of the skeleton, 
but fruitlessly ; and as the cliff-foot is now wasted back to such a 
distance as to make the recovery of it most unlikely, the time has 
come when, without incurring the charge of undue haste, I may 
bring under the notice of the Society these evidences of what I 
venture to think will be received as a new Dinosaurian genus. 
Vertebre.—Of these, four (Nos. 24 (figs. 4-7), 25, 26, 28)* are 
presacral, and one (No. 27) postsacral (Pl. XXI. figs. 2,3). Of the 
four presacral vertebrae, three are centra, each retaining its neural 
arch, and one is represented by a detached neural arch. These pre- 
sacral centra are all opisthoccelous. The hollowness of the posterior 
articular surface (fig. 6) is so decided that its figure may be 
properly described as cupped. The anterior articular surface 
(fig. 5) is, in its present state, nearly plane; in none does it 
exhibit a convexity such as might have been inferred from the 
hollowness of the posterior surface. This apparent want of cor- 
respondence of figure of the two articular surfaces may be due to 
removal by post mortem maceration of the fibro-cartilaginous layer 
clothing the fresh bone, the effect of which would be to lessen the 
convexity and deepen the concavity. The circumferential contour 
of the articular surfaces is heart-shaped, that of the posterior being 
fuller than that of the anterior surface.. The neural portion of this 
circumference is, for the anterior surface, nearly straight, for the 
posterior surface notched. The outer or non-articular surface is cén- 
cave longitudinally and convex transversely, which gives it the figure 
of a laterally flattened cylinder bluntly keeled below. A narrow 
mesial tract of the upper surface of the centrum, visible between the 
neurapophyses, forms the floor of the neural canal. The neural 
suture, perceptible in the three vertebree, descends slightly on the 
lateral surface of the centrum. Relatively to the length of the 
centrum, the antero-posterior extent of the neurapophyses is con- 
siderable. One vertebra (No. 24, figs. 4-7) retains both praezyga- 
pophyses and transverse processes. ‘The former look almost directly 
upwards with a slight inward slant. The transverse processes are 
* The numbers refer to the Catalogue of my collection, 
