248 Prof. H. G. Seeley on the Ornithosaurian Pelvis. 



the anterior side of the pubis, extend forward in a bow and 

 appear to be anchylosed mesiallj. The median part between 

 the two limbs of this bone measures j% inch transversely and 

 the transverse measurement 

 between its extremities is 1-^^ Tig. 9. 



inch. This therefore gives 

 the approximate width be- 

 tween the points of the pubis 

 with which this bone articu- 

 lated. The ischium and pubis 

 are rather thick bones, show 

 no trace of a dividing suture, 

 are directed somewhat back- 

 ward, and, as usual, are imper- 

 forate. There seems to be a 

 small foramen in the position 

 of the obturator foramen of 

 Cretaceous genera, and in 

 those genera the foramen lies 

 in the ischio-pubic suture." 



In another specimen, marked 

 "Rk. Munsteri (Goldf.), = i?^. 

 Gemmingi (v. Meyer)," the 

 sacrum appears to include 

 three or four vertebrae. The 

 ilium, which is blended with 

 the sacral ribs, is lyu" inch 

 long, and is prolonged for 

 about the same distance on 

 each side of the acetabulum. 

 The anterior process deepens 

 as it extends forward, and it is 

 about Y^ inch longer than the 

 slender posterior process. A 

 minute obturator foramen 

 marks the union of the ischium 

 and pubis, which are directed 

 somewhat backward and 

 blended into a compact os 



innominatum. The pubis is thick and strong. Tiie pre- 

 pubic bones appear blended into a bow-shaped bar. It 

 consists of a middle straight portion and right and left parts 

 which are inclined to it, though not quite symmetrical as 

 preserved. Each of these three parts would measure about 

 ^ inch in length. The transverse measurement over the 



lihamphorhynchtis longimanus. 

 (Wagn. Abh. Miinch. viii. T. xy\.) 



Ym. 10. 



Bh. Gemminyi. (Zittel, Pal. 

 xxix. T. xii. fig. 2.) 



