STENEOSAUKUS. 



113 



seems to have been covered with a thick pad of cartilage and the condyles are often 

 imperfectly ossified. 



The tibia (text-fig. 46) was a comparatively thin-walled bone, all the specimens being 

 much crushed, especially in the region of the shaft. The length is about half that of 

 the femur — that is to say, considerably less in proportion than in the recent Crocodiles, 

 in which the length of the tibia to that of the femur is roughly as three to four. 

 The proximal end is massive and wide : it is occupied by the broad articular surface 



Text-fig. 46. 



ir af 



a.f 



Eight tibia and fibula of Steneosaurtts leedsi : A, from front ; B, proximal end ; C, distal end of fibula. 



(E. 3806, | nat. size.) 



a.f., astragalar facets ; c.f., calcaneal facet ; /., fibula ; i.e., inner condyle ; 

 o.c, outer condyle ; t., tibia ; t.f., tibial facet. 



for the femur, which projects considerably posteriorly and internally ; this articular 

 surface forms an almost continuous gentle convexity, the division into an inner 

 and outer surface for the femoral condyles being scarcely marked. At the outer 

 (fibular) side of the proximal end there is a flange which probably united with the 

 fibula ; at its upper end there is a convex articular surface (o.c.) looking upwards and 

 PART II. Q 



