( 192 ) 



hinder margin. These latter recur on the remaining free dorsals and also on the first 

 two fused pelvic vertebrae. 



The last three cervicals and the two cervico-dorsals bear hyi)erapophyses above 

 the post-zygapophyses. 



Large pneumatic foramina perforate the base of the neural arch fi-om the second 

 cervico-dorsal (23) to the last free dorsal (27) inclusive ; and similar openings occur 

 immediately behind the base of the transverse processes in vertebrae 22 to 26. 



The total length of the vertebral column (exclusive of the pelvic vertebrae) 

 measured along the ventral surface is about 187 cm. 



The first of the pelvic vertebrae sup]X)rts a free rib, the second a fused rib; these 

 two vertebrae also bear jiaired haemapophyses near their hinder border. The post- 

 acetabular vertebrae have a low keel on the ventral surface of their centrum. 



The pelvis is narrow, and the preacetabular portions of the ilia meet at a very 



Fig. 2. — Sterncm of MEO.^LArTEuy.x texuipes Ltd. 

 From below, c.ji., coracoid pit. (-^- natural size.) 



acute angle to form the iliac crest, which is convex from before backward. The ilia 

 begin to diverge about opposite the middle of the acetabulum ; the external surface 

 of their postacetabular region is narrow from above downwards, and, except close to 

 the posterior end, the thickened ventral margins do not descend below the level of 

 the centra of the posterior pelvic vertebrae. The distal portion of the ischium is 

 greatly expanded, but it remains separated by a considerable interval from Ihe ilium. 

 There is a blunt, not very prominent pectineal tubercle. 

 The dimensions of the pelvis are : — 



Length of sacrum in a straight line .... 255 mm. 



Greatest width of pehic escutcheon 



Greatest length of ilia . 



Width at pectineal processes 



Width at antitrochanters 



Least width of preacetabular region 



Width between distal ends of pubis 



The Slenium. — The sternum (fig 2) has a nearly straight anterior Ijorder between 



120 

 320 

 101 

 140 

 G8 

 95 



