424 J. W. HULKE ON A NEW WEALDEN DINOSAUR. 
from Poikiloplewron, remains ascribed to a small species of which, 
P. pusillus, are described and figured by R. Owen in the Pal. Soc. 
Mem. 1876. 
For this new Wealden Dinosaur, represented by the remains which 
I have the honour of now placing before the Society, indicating an 
individual about 3 feet long, exclusive of tail, I propose the name 
Vectisaurus valdensis,a name suggestive of the locality, Znsula Vectis, 
and the formation whence I obtained it. 
In the form of the antacetabular process it shows a nearer re- 
semblance to the Iguanodontide than to the Megalosauride. 
EXPLANATION OF PLATE XXII. 
Fig. 1. The right ilium, inner surface. ac, acetabulum; pd, its pubic 
process ; pr. ac, preeacetabular process. 
Fig. 2. Caudal vertebra, posterior surface. , neural canal; ms, neurapo- 
physial suture ; ch, chevron facet. 
Fig. 3. Under surface of same. 
Figs. 4-7. Thoracic vertebra. Fig. 4, viewed from above ; fig. 5, from in 
front; fig.6, from behind ; fig. 7, side view. d, diapophysis; p, para- 
pophysis ; prz, prezygapophysis. 
(The figures are of the natural size.) 
Drscusston. 
Prof. Srrrzy asked the author to what form of Dinosaurs the 
new genus appeared to him to be most closely related. That the 
specimens were Dinosaurian, and belonging toa perfectly new genus, 
there could be no doubt whatever. He remarked that the ribs were 
united to the termination of the transverse processes of the verte- 
bree, and that the neural spine was deeply cleft in form. 
The AutHor replied to Prof. Seeley that he regarded the form 
he had described, as most closely allied, especially in the great 
length of the preacetabular process, to the Iguanodontide ; and he 
pointed out on the transverse process a double costal articulation. 
