154 



Prof. H. G. Seeley 



-y\ inch in each measurement, and slightly oblique, as in AffW- 

 sauriis. It is shown to be a right tibia by the manner in 

 which the surface from which the astragalus has become lost is 

 excavated on its external border, as in Acjrosaurus ; so that the 



Fis. 5. 



Anterior aspect, i 



Fibular aspect. 



Distal articular 

 surface. 



Pist U end of the left tibia of Palcsosaurus. Brist. Mas. no. 53. 

 4 nat. size. 



astragalus must have been subquadrate, but, as in many Saur- 

 ischians, deepest on the fibular border. There is an indication 

 by an ascending groove of a small ascending talon, making 

 some approach to Dimosaurus. 



The tibia on slab 63 shows less than 6 inches of its proximal 

 end, which is only 2 inches wide, and has the cnemial crest 

 defined by a small superior cavity, which is continued down- 

 ward by the fibular groove on the external aspect. The 



shaft of the bone is about 



ich 



appears to be expanding slightly towards tlie distal fracture. 



The Fihula o/ Palasosaurus. (Fig. 6.) 



A bone which I regard as being the left fibula agrees 

 closely with the tibia in its length, is of about the same 

 dimensions as the tibia no. 76 in the shaft, though but 

 little expanded at the proximal and distal ends. It may have 

 belonged to a species with rather more robust bones, such as 

 is indicated by the slab tibia, no. 63. The distal extremity, 



which is exposed in lateral 



is strong and moderately 



expanded, like the distal end of the tibia no. 76, which it 

 resembles in size. It has a convexly truncated distal end, 

 which is about ly^^ inch wide. The bone is somewhat 

 imperfect in fracture, but has a slender shaft | inch wide, with 

 subparallel sides ; the oblique proximal end widens to about 



