XI. 



MEGALOSA URUS PELVIS. 



211 



This restoration in outline of the left hind limb of Megalosaurus is drawn from 

 specimens, with the exception of the fibula, calcaneum, and ordinary phalangal bones 

 the claw-bone is known. Dotted lines represent the probable position of the pubic 

 and ischial bones (according to the view of Professor Huxley) ; these being preserved 

 in the British Museum and in the collections of the University of Oxford. 



The principal bones are marked : il. = ilium, pub. = pubis, isch. = ischium, fern. = 

 femur, tib. = tibia, fib. = fibula, c. = calcaneum, a. = astragalus. Cuvier supposed 

 the calcaneum to be smaller than here represented. 



Ischium. This is the long doubly-bent bone represented in 

 Diagram LXV., which was regarded as a clavicle, but by com- 

 parison with specimens of iguanodon and skeletons of struthious 

 birds, has acquired quite a new meaning in the hands of Professor 

 Huxley. The Oxford Museum contains one nearly complete 



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\ 



Diagram LXV. Ischium of Megalosaurus. Scale one-tenth of nature, 

 i. External view, right side. 2. Internal view, shewing the oblique symphysis. 



specimen and a portion of another. The bone met the prominent 

 part of the ilium behind the acetabular socket, by its bulky head 

 which retains marks of the adherence. A sharp and very prominent 

 keel rising much above the general surface passes in a half spiral 

 along the bone. Length twenty-four inches. 



Pubis. This slightly-curved, slender, and comparatively simple 

 long bone (Diagram LXVI.) has been usually regarded as a fibula; 



