528 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 25, 



which may be a lunare, and the other, from the coaptation of one 

 of its articular surfaces, maybe the corresponding ossicle in the second 

 row. Two metacarpals and theproximal endof a third arerecognizable. 

 Their lengths are -67 and *7 inch. The proximal ends are squared 

 and stout, the diaphysis is slender, and the distal end pulley-shaped. 

 Seven digital phalanges remain, of which three are ungual. Of the 

 four others, the two larger are respectively -3 and -25 inch long, 

 which is nearly twice their transverse diameter taken midway 

 between the articular ends. The two smaller phalanges are "5 and -2 

 inch long ; and even these, relatively to their width, are longer than 

 corresponding phalanges in the manus of Mantell's Iguanodon. The 

 unguals (a, b) are nearly straight, sharply pointed, and they are not 

 depressed and flattened as those of Iguanodon, from which they also 

 differ in the presence of a conspicuous claw-groove, which runs inside 

 the upper surface of a slightly projecting border that separates the 

 upper from the under surface of the phalanx. 



Haunch and hind limb. — I did not recover the ilium ; but three 

 from two other individuals were strikingly like those displayed in 

 the familiar Iguanodon-al&b from Maidstone, preserved in the palae- 

 ontological gallery of the British Museum. The upper border, which 

 is rather stouter than the broad plate below it, is prolonged forwards 

 above and beyond the acetabulum as a long, slender process, which 

 I have not seen complete, but which, in a nearly perfect specimen, 

 was about as long as the postacetabular part of the bone. In 

 these three examples the lower preacetabular, or pubic process, was 

 well marked. It was directed downwards and forwards when the 

 axis of the ilium was placed parallel with that of the vertebral 

 column. The ischial articular facet was a slightly swollen emi- 

 nence, not deserving, any more than in Mantell's Iguanodon, to be 

 called a process. Behind the acetabulum the lower border of the 

 bone is directed almost horizontally backwards, and it makes a blunt 

 angle with the upper border, which bends downwards and meets it. 

 The postacetabular part of the broad plate, or body of the ilium, at 

 the level of about two thirds of its depth from the upper border, is 

 angularly inflected towards the mesial line beneath the sacrum. The 

 inner surface is stamped, as in Iguanodon, with a sinuous impres- 

 sion of alternating elevations and depressions corresponding to the 

 shape of the outer surface of the confluent sacral transverse pro- 

 cesses. The pubes and ischia are known to me only in the Mantell- 

 Bowerbank skeleton. 



Femur. — The thigh-bone has a general resemblance to that of 

 Iguanodon ; but it may easily be distinguished from this by the form, 

 relative size, and the position of its inner trochanter. This, when 

 perfect, is a large triangular wing pointing downwards, and situated 

 nearer the proximal end of the thigh-bone than in Mantell's Dinosaur. 

 The head is subglobular, and it is borne on a distinct neck, which 

 makes almost a right angle with the axis of the shaft. In two veiy 

 perfect and undistorted examples, the proximal end of the shaft 

 was laterally compressed in such a way that its surfaces looked out- 

 wards and inwards when the neck was supposed to be directed ver- 



