FORM OF DLNOSAURIAN ILIUM. 

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Pig. 1. Eestoration of Iguanodon's pelvis, about one fourteenth natural size. 

 „ 2. A corresponding view of pelvis of Ostrich. 

 ,, 3. A corresponding view of pelvis of an existing species of South- American Lizard, 



about twice natural size. 

 ,, 4. A corresponding view of pelvis of Crocodilus niloticus, about one fifth natural size. 



The homologous parts in each figure are indicated by the same letters, viz. A, aceta- 

 bulum ; 77, ilium ; pra, its praeacetabular process ; psa, its postacetabular part ; Is, ischium ; 

 P, os pubis ; p, the part directed beneath the belly where in the Lizard it meets its fellow 

 in a mesial symphysis ; p', its postacetabular part directed backwards parallel with the 

 ischium, wanting in Lizards and Crocodiles ; ob.f, obturator foramen ; obt, foramen for the 

 transmission of the tendon of the mu9culus obturator internus. 



