M. Talbot — Podokesaurm holyoJcensis. 



473 



The contact with the ilium and the acetabular edge is 

 obscurely visible. 



There is a bone running posteriorly from the head of the 

 right femur which may be the posterior process of the ilium 

 (tig. 1 and fig. 2, II.), the anterior process being covered by the 

 femur. This posterior extension can be traced indistinctly for 

 27 ram and either points upward or continues the line of the 

 posterior part of the vertebral column. 



Vertebral. — Of the vertebrae there are visible seventeen pre- 

 sacral (fig. 1, Y.) and thirteen caudal (fig. 3, V.), all very light 



Fig. 3. 



Fig. 3. Caudal vertebrae and sknll bones (?). x %. 

 A, B. C. Bones of the skull (?). D, E, F, G, V. Caudal vertebrae. 



and hollow, and some, at least, slightly concave at each end. 

 The presacral vertebras are slender, the measurements for the 

 sixth presacral heing 4 mm through the middle of the centrum, 

 6 mm at the ends and 15 mm from. end to end. A strong, grace- 

 fully curved neural spine (fig. 1, N. S.) rises from the vertebrae 

 in the dorsal region, about 10 mm high and 12 mm long at the 

 base. The first two or three presacrals are a little larger than 

 the others and those at the anterior end of the column, much 

 stronger. One of the latter measures 10 n ' m at the end and the 

 diameter through the middle of the centrum is only a little 

 less. They are not so long, however, measuring only from 12 mm 

 to 13 mm . One of these vertebrae is shown in cross section at a 

 thin edge of the rock and has a transverse diameter through 



