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AXIAL SKELETON OF THE PELECANIDS. 
The parapophyses of the lumbar vertebra form together three presacral foramina on 
each side (fig. 3, s!,s*,s*). Postaxiad of this there are no parapophyses, but the wide 
as well as long (though somewhat longer than wide) subquadrate renal fossa appears on 
each side. 
The parapophyses of the three sacral vertebra become shorter postaxially. 
Those of the sacro-caudal vertebre remain of about the same transverse extent as 
those of the third sacral vertebra. 
There is no fossa on the ventral surface of the ilium towards its postaxial end, any 
more than there is in any of the Struthionide; but there is a wide surface (posterior 
iliac ventral surface) of ilium extending outwards on each side between the distal ends 
of the sacro-caudal parapophyses and the outer margin of the ilium (fig. 3, 7’). 
Tue Inium. 
This bone almost extends to roof over the last dorsal vertebra but one (ze. the 
twenty-first vertebra) ; an ossification of fascia connected with it continues onto two or 
three vertebree more preaxial, 
Seen laterally, the preacetabular part has its dorsal margin very slightly convex; its 
ventral margin is concave in even a less degree than the other is convex. ‘The two 
margins meet together preaxially. There is no ilio-pectineal process. 
The ilium probably takes about the same share in forming the acetabulum that it 
takes in Struthio. 
The postacetabular part of the ilium decidedly exceeds in length its preacetabular 
part. Seen laterally this part is at first very small (¢. e. above the sacro-sciatic foramen), 
but more postaxially it expands dorso-ventrally to join the ischium. 
Seen dorsally this part is widest just behind the antitrochanteric process, whence it 
narrows postaxially to the hinder end of the sacro-sciatic foramen, and then expands to 
join the ischium. 
The postaxial end of the ilium develops a large ilio-caudal process (Jc), which is sepa- 
rated from the sacrum by a narrow notch, and from the postaxial end of the ischium 
by a much wider notch. 
There is a gluteal ridge (fig. 1, g/) extending along the dorsal edge of the ilium from 
the preaxial end back to the antitrochanteric process. Just behind and above this 
process isa small prominence (figs. 1 & 2, st), which may be compared to the supra- 
trochanteric process of the Struthionide, and may be here termed the posttrochanteric 
process. The ilium has on its ventral surface the supraacetabular fossa before described. 
Tue Pusis. 
This bone is long and very narrow, with a sigmoid curvature, but without any promi- 
nent process. It forms no ankylosis with any other bone postaxial to its origin. It 
widens (dorso-yentrally) just postaxiad to its ligamentous attachment to the ischiun. 
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