376 



DINOSAURIAN- FOOT-BONES FROM THE WEAtDE!^. 



series that it may be pretty safely regarded as 

 the third metapodial of the opposite side to 

 that to which the Cambridge metapodium 

 belonged. This is especially well sliown by 

 the contour of the proximal extremity/ which 

 is broad and squared, with a distinct process 

 at the antero- external angle, where it over- 

 lapped the fourth metapodial. The Cambridge 

 specimen belonging to the left side, our 

 example will pertain to the right. 



There are, however, certain differences in 

 the contour of the third metapodial in the 

 two sets of bones, which suggest that while 

 the one belongs to the metatarsus the other 

 should be regarded as pertaining to the 

 metacarpus. The small size of the Hastings 

 metapodial is in favour of its being a meta- 

 carpal ; while, since the third metapodial of 

 the Cambridge specimen is a comparatively 

 large bone, having a length of some six 

 inches, Dr. Baur is very probably right in 

 referring that specimen to the metatarsus. 



The Hastings metapodial would seem too 

 small for Hoplosaurus armatus {Omithopsis 

 Hulkei), and it is therefore probable that it 

 may be referable to the smaller Dinosaur 

 known as Morosaums hrevis!^ Unfortu- 

 nately, the foot-bones of the typical American 

 representatives of the latter genus have not 

 yet been figured on a scale such as to admit of 

 comparison with our specimen. The present 

 specimens are smaller than the metatarsals 

 and other bones mentioned above as being 

 provisionally referred to M. hrevis, but might 

 well belong to the manus of the same animal. 

 The metatarsals of the last-named series are 

 lateral, and therefore differ m contour from 

 the present specimen. The phalangeal, which 

 was probably separated from the metapodial 

 by an intervening segment, shows the ex- 

 treme shortness characteristic of the Sauropo- 

 dous Dinosaurs. I believe these specimens 

 to be the first remains of the Sauropoda which Mr. Dawson 

 obtained in all his large series from the Wadhurst Clay. 



Postscript. — Since the above description was written, Mr. Dawson 

 has been good enough to send me some more imperfect metapodials 

 belonging to the same foot, but I have been unable to assign them 

 to their proper position. 



^ In Prof. Seeley's figure the front border of the proximal end is placed 

 upwards, wliereas in the present figure it is downwards. 

 ^ = Cetiosaurus brevis, Owen. 



Proximal {a) and ante- 

 rior (6) aspects of the 

 third right metapodial 

 (? metacarpal), and (c) 

 anterior aspect of an 

 associatedphalangeal, 

 of a Sanropodous J)\- 

 nosaur {?Morosaurus). 

 From the Bone-bed of 

 the Wadhurst Clay, 

 "I nat. size. 



